IELTS Academic Vocabulary List
120+ high-frequency academic words organised by IELTS topic. Each entry includes the part of speech, a clear definition, and an example sentence in an IELTS examination context.
Why vocabulary matters on the IELTS
Matching Headings and Sentence Completion tasks heavily rely on paraphrasing. Knowing academic synonyms is essential for recognising when a question stem restates passage content.
Lexical Resource accounts for 25% of your Writing score. Examiners reward a wide range of accurate vocabulary; repetition and basic words keep you below Band 6.
Candidates who command topic-specific vocabulary speak more fluently and with fewer hesitations, which directly impacts both Lexical Resource and Fluency & Coherence scores.
Tip: When you encounter an unfamiliar word in a Reading passage, use surrounding context clues before consulting a dictionary. IELTS Sentence Completion tests whether you can infer meaning from context, not isolated recall.
Vocabulary & IELTS: The Data
Vocabulary knowledge is one of the strongest predictors of IELTS band scores. Here is what research and exam structure data show.
Fun facts
→IELTS tests approximately 3,500 word families — far fewer than native speaker vocabulary of 20,000+.
→The Academic Word List (AWL) covers 10% of all academic text, making it the highest-value vocabulary set to study.
→Lexical Resource is assessed on range, accuracy, and appropriacy — using the same word repeatedly lowers your score even if it is correct.
→Band 9 responses in Speaking feature a wide variety of idiomatic expressions used naturally and accurately.
Browse by Topic
Environment & Climate
15 wordsThe action of clearing a wide area of trees.
The IELTS passage argued that deforestation in tropical regions is the primary driver of biodiversity loss.
Relating to a natural resource that is replenished by natural processes at a rate comparable to its consumption.
The graph showed a sharp increase in renewable energy capacity over the past two decades.
The production and discharge of a substance, especially gas or radiation, into the atmosphere.
The essay asked candidates to discuss whether carbon emission taxes are an effective policy tool.
The variety of plant and animal life in a particular habitat or on Earth as a whole.
According to the passage, loss of biodiversity poses long-term risks to global food security.
The action of reducing the severity, seriousness, or painfulness of something.
The lecture discussed mitigation strategies for reducing the urban heat island effect.
A biological community of interacting organisms and their physical environment.
The reading text described how a single invasive species can destabilise an entire ecosystem.
The process of making something impure or poisonous by introducing a polluting substance.
Soil contamination from industrial runoff was the central theme of the IELTS Academic reading passage.
Able to be maintained at a certain rate or level without depleting natural resources.
Candidates were asked to evaluate whether sustainable agriculture can feed a growing global population.
The natural home or environment of an animal, plant, or other organism.
The passage outlined how urban sprawl destroys the habitat of native species.
Rain, snow, sleet, or hail that falls from the sky; the quantity of this.
Changes in annual precipitation patterns are one measurable consequence of climate change.
The capacity to recover quickly from difficulties; the ability of an ecosystem to return to equilibrium.
The writer argued that ecological resilience depends on maintaining diverse species populations.
The process of capturing and storing atmospheric carbon dioxide, especially in forests or oceans.
Carbon sequestration by old-growth forests makes their preservation a climate priority.
Having little or no rain; too dry or barren to support vegetation.
Expanding arid zones in sub-Saharan Africa are displacing farming communities.
The process by which fertile land becomes desert as a result of drought or human activity.
The IELTS Task 1 map showed the extent of desertification across the Sahel region over 50 years.
The critical threshold beyond which a system undergoes an abrupt irreversible change.
Several climate scientists warn that some ecosystems may have already passed a tipping point.
Society & Culture
15 wordsThe process by which towns and cities grow as people migrate from rural areas.
The bar chart illustrated the rapid urbanisation of developing economies between 1990 and 2020.
Statistical data relating to the composition and structure of a population.
Shifting demographics have forced governments to reconsider pension and healthcare spending.
The process by which an individual or group adopts the culture and identity of another group.
The essay question asked whether cultural assimilation is beneficial or harmful to immigrant communities.
Lack of equality, especially in status, rights, or opportunities within a society.
The passage examined the relationship between income inequality and educational attainment.
Treated as of little importance or pushed to the edge of society.
Access to digital technology remains unequal, leaving marginalised communities further behind.
The action or fact of forming a unified whole; social unity and solidarity.
The writer argued that shared public spaces are essential for maintaining social cohesion.
The presence of, or support for the presence of, several distinct cultural or ethnic groups.
Candidates were asked to discuss the advantages and disadvantages of multiculturalism in modern societies.
A mark of disgrace associated with a particular circumstance, quality, or person.
The IELTS passage explored how stigma surrounding mental illness prevents people from seeking help.
A standard or pattern of social behaviour that is typical or expected.
Cultural norms around gender roles vary significantly across different societies.
The movement of people from one place to another, often in search of better conditions.
Economic migration has transformed the demographic profile of many European cities.
The desire to promote the welfare of others, expressed by charitable donations or activities.
The reading passage discussed whether corporate philanthropy can substitute for government social spending.
Property inherited from predecessors; the practices, beliefs, and traditions passed from generation to generation.
Preserving intangible cultural heritage is increasingly recognised as important by UNESCO.
Originating or occurring naturally in a particular place; native.
The essay questioned whether indigenous land rights are adequately protected under international law.
The process whereby a poor urban area is renovated and transformed by wealthier residents, displacing the original population.
Gentrification in major cities has improved infrastructure while simultaneously pricing out low-income residents.
A great difference or inequality between two or more things.
The data revealed a striking disparity in health outcomes between high- and low-income neighbourhoods.
Technology & Innovation
15 wordsThe use of largely automatic equipment or technology to perform tasks previously done by humans.
The IELTS essay asked whether automation will ultimately create more jobs than it destroys.
The simulation of human intelligence processes by computer systems.
The passage examined ethical concerns raised by the rapid deployment of artificial intelligence in healthcare.
Causing radical change to an established industry or system, especially through technology.
Ride-sharing platforms have had a disruptive effect on the traditional taxi industry worldwide.
A set of rules or instructions followed by a computer to solve a problem or complete a task.
The reading text raised concerns about algorithmic bias in automated recruitment tools.
The basic physical and organisational structures needed for a system to operate.
Digital infrastructure investment is increasingly viewed as essential to economic competitiveness.
The process of introducing new ideas, methods, or products.
The bar chart compared levels of technological innovation across OECD countries.
No longer in use or no longer useful; out of date.
Many manufacturing skills have become obsolete as robotic processes replace manual labour.
Close observation, especially of a suspected criminal or of activities in a public space.
The essay debated whether widespread digital surveillance is justified by the security benefits it provides.
Rapid increase in the number or amount of something.
The proliferation of social media platforms has fundamentally changed how news is consumed.
The practice of protecting systems, networks, and programmes from digital attacks.
The passage argued that cybersecurity has become a national security priority for all governments.
A government licence giving an inventor exclusive rights to their invention for a set period.
Disputes over software patents have become a major source of litigation in the technology sector.
To repeat a process, especially to develop a product through cycles of refinement.
Successful tech companies iterate quickly, releasing updates based on user feedback.
The capacity of a system to handle increased demand without losing performance.
The startup's business model was praised for its scalability in emerging markets.
The capacity for data transmission across a network.
Rural communities lack the broadband bandwidth needed to participate in the digital economy.
The exploitation of biological processes for industrial and other purposes.
Advances in biotechnology have opened new possibilities for treating previously incurable genetic conditions.
Health & Medicine
15 wordsA disease outbreak that has spread across countries or continents affecting a large number of people.
The IELTS passage examined how the 2020 pandemic exposed weaknesses in global health infrastructure.
The rate of death in a population, or the state of being subject to death.
The line graph showed a steady decline in child mortality rates over the past four decades.
Action taken to stop something undesirable from happening, especially disease.
Public health experts argue that disease prevention is far more cost-effective than treatment.
A widespread occurrence of a disease in a community at a particular time.
The obesity epidemic has prompted calls for stricter regulation of the food and beverage industry.
Treatment with a vaccine to produce immunity against a disease.
The essay question asked whether vaccination should be compulsory or left to individual choice.
The likely course or outcome of a disease; a forecast.
Early diagnosis significantly improves the prognosis for most forms of cancer.
Persisting for a long time or constantly recurring; relating to a long-term illness.
The passage explored the economic burden of chronic diseases on national healthcare systems.
Characterised by much sitting and little physical exercise.
Increasingly sedentary lifestyles are linked to rising rates of type 2 diabetes and cardiovascular disease.
The chemical processes in a living organism by which energy is provided for vital processes.
The reading text described how sleep deprivation disrupts metabolism and increases appetite.
A medicine that kills or inhibits the growth of bacteria.
The overuse of antibiotics is driving the emergence of drug-resistant infections.
Relieving pain or alleviating a problem without dealing with the underlying cause.
The passage examined the growing importance of palliative care for elderly populations.
Treating the whole person rather than just the symptoms of a disease.
Many practitioners advocate a holistic approach to mental health that addresses social and environmental factors.
Lack of proper nutrition caused by not having enough food or not eating the right foods.
Malnutrition in early childhood can have irreversible effects on cognitive development.
Having a healing effect; relating to the treatment of disease.
Regular exercise has well-documented therapeutic benefits for depression and anxiety disorders.
The scientific study of the nervous system, especially the brain.
Advances in neuroscience are beginning to explain how language learning reshapes brain structure.
Economics & Business
15 wordsThe process by which businesses and organisations develop international influence or operate on an international scale.
The essay asked whether globalisation has widened or narrowed the gap between rich and poor nations.
A period of temporary economic decline during which trade and industrial activity are reduced.
The line graph illustrated the impact of the 2008 recession on GDP growth in major economies.
A sum of money granted by the government to keep the price of a product or service low.
Agricultural subsidies are often criticised for distorting global food markets.
A general increase in prices and fall in the purchasing power of money over time.
High inflation erodes the real value of wages and savings for ordinary households.
The exclusive possession or control of the supply of a good or service.
Regulators are increasingly scrutinising the market monopoly of major technology companies.
Relating to government revenue, especially taxes.
The government introduced a range of fiscal measures to stimulate economic growth.
A person who sets up a business, taking financial risks in the hope of profit.
The passage argued that successful entrepreneurs are motivated by more than financial reward.
Difficult economic conditions created by government measures to reduce public expenditure.
Critics argued that austerity policies deepened inequality rather than reducing national debt.
The practice of protecting domestic industries from foreign competition through tariffs or quotas.
The essay topic concerned whether protectionism damages global trade more than it helps domestic workers.
The removal or reduction of regulations or restrictions in an industry.
Deregulation of the banking sector in the 1990s is widely cited as a factor in the 2008 financial crisis.
A raw material or agricultural product that can be bought and sold.
Developing nations heavily reliant on a single commodity export are vulnerable to price volatility.
An amount of something left over when requirements have been met; excess supply over demand.
A persistent trade surplus can create diplomatic tensions with trading partners.
Financial services provided to low-income individuals or businesses that lack access to conventional banking.
The passage explored the role of microfinance in lifting rural entrepreneurs out of poverty.
A large corporation made up of a number of different companies in different industries.
The reading text examined whether media conglomerates pose a threat to editorial independence.
Liability to change rapidly and unpredictably, especially for the worse.
The chart showed high volatility in commodity prices throughout the past decade.
Education & Research
15 wordsThe subjects forming a course of study in a school or university.
The essay asked whether national curricula should prioritise STEM subjects over the arts.
The method and practice of teaching, especially as an academic subject.
The passage contrasted traditional and child-centred pedagogy in primary education.
The ability to read and write; competence or knowledge in a specified area.
Digital literacy is increasingly considered a fundamental skill alongside reading and numeracy.
Based on observation or experience rather than theory alone.
The researcher called for more empirical evidence before policy changes were implemented.
A proposed explanation made on the basis of limited evidence as a starting point for investigation.
The passage described how the team tested the hypothesis that bilingualism delays the onset of dementia.
Evaluation of scientific, academic, or professional work by others working in the same field.
The credibility of a study depends largely on whether it has undergone rigorous peer review.
Relating to or drawing from more than one branch of knowledge.
Addressing climate change requires an interdisciplinary approach combining science, economics, and political science.
A system of methods used in a particular area of study or activity.
The research methodology combined quantitative surveys with qualitative interviews.
The process of officially recognising an organisation or qualification as meeting required standards.
Universities seek international accreditation to attract students from overseas.
Learning through memorisation and repetition rather than understanding.
Critics of rote learning argue that it produces students who cannot apply knowledge to new contexts.
Relating to the mental processes of acquiring knowledge and understanding.
The passage explored the cognitive benefits of learning a second language in early childhood.
Relating to or measured by quantity; involving the measurement of numerical data.
A quantitative analysis of test scores showed significant improvements after the intervention.
A long essay or thesis, especially one written for a university degree.
The reading text described common mistakes students make when structuring a research dissertation.
The continued possession or use of something; the ability to remember information.
Spaced repetition significantly improves long-term vocabulary retention compared to massed practice.
The objective analysis and evaluation of an issue in order to form a judgement.
Employers consistently rank critical thinking among the most desirable graduate attributes.
Politics & Law
15 wordsSupreme power or authority of a state to govern itself.
The essay debated whether international trade agreements erode national sovereignty.
Laws considered collectively; the process of making or enacting laws.
New environmental legislation requires industries to report their carbon emissions annually.
A system of government with complex rules and processes; excessive official procedure.
Many small businesses cite bureaucracy as a major obstacle to growth and expansion.
A system of government in which power is vested in the people, exercised directly or through elected representatives.
The passage examined whether social media strengthens or undermines democratic processes.
The official power to make legal decisions; the territory over which authority extends.
Cybercrime presents jurisdictional challenges because it often crosses national borders.
A general vote by the electorate on a single political question.
The essay question asked whether referendums are an effective tool of direct democracy.
Openness, accountability, and honesty in the operation of an organisation or government.
Voters increasingly demand greater transparency in political campaign financing.
A penalty imposed on a country or individual to compel compliance; also, official permission or approval.
Economic sanctions have been applied as a diplomatic tool to pressure governments into compliance.
The activity of seeking to influence a politician or public official on an issue.
The passage questioned whether lobbying by powerful industries distorts the democratic process.
The rights of citizens to political and social freedom and equality.
Anti-terrorism legislation has been criticised for curtailing civil liberties in peacetime.
A body of fundamental principles according to which a state is governed.
The essay asked whether a written constitution better protects individual rights than an uncodified one.
A board or committee formed to adjudicate on a particular matter.
International tribunals have been established to prosecute war crimes under international law.
A minor change or addition made to improve a text, law, or document.
The constitution has undergone numerous amendments to reflect evolving social values.
The transfer of power from a central government to a regional or local authority.
Proponents of devolution argue that local governments are better placed to understand community needs.
A system of government in which one person holds absolute power.
The passage contrasted the economic performance of democracies and autocracies over the past century.
Science & Nature
15 wordsThe process by which species develop from earlier forms through natural selection.
The IELTS passage described how island isolation accelerates evolutionary divergence.
The process by which green plants convert sunlight, carbon dioxide, and water into glucose.
Photosynthesis forms the energetic foundation of virtually all food chains on Earth.
A mutually beneficial interaction between two different organisms living in close association.
The reading passage described the symbiosis between mycorrhizal fungi and plant roots.
A substance that speeds up a chemical reaction without being consumed; figuratively, something that triggers change.
Enzymes serve as biological catalysts, enabling metabolic reactions to proceed rapidly at body temperature.
A feature or behaviour that helps an organism survive and reproduce in its environment.
The camel's ability to store fat in its hump is an adaptation to arid desert conditions.
The complete set of genes or genetic material present in a cell or organism.
Sequencing the human genome has opened new possibilities for personalised medicine.
The gradual destruction of rock, soil, or other material by natural forces.
The IELTS diagram showed how coastal erosion has reshaped the shoreline over 50 years.
A proposed explanation made on the basis of limited evidence as a starting point for investigation.
Scientists developed a hypothesis that microplastics in seawater affect fish reproductive systems.
A state of balance between opposing forces or influences.
Introducing a predator can restore ecological equilibrium by controlling prey populations.
The process by which water vapour in the air is changed into liquid water.
Condensation on mountain slopes is a critical source of freshwater in many regions.
Temporarily inactive; in a state of rest or inactivity.
The volcano had been dormant for two centuries before its sudden eruption.
Allowing fluids or gases to pass through; penetrable.
Permeable rock strata allow rainwater to accumulate in underground aquifers.
Matter that settles to the bottom of a liquid; deposits laid down by water, wind, or glaciers.
River sediment carried from the highlands has built up into a fertile delta over millennia.
Relating to the structure of the Earth's crust and large-scale processes such as the movement of plates.
Tectonic activity along the fault line makes the region highly susceptible to earthquakes.
The speed of an object in a specified direction.
Scientists measured the velocity of glacial movement to estimate future ice-sheet loss.
Ready to test your vocabulary in context?
The best way to consolidate new vocabulary is to encounter it in realistic exam questions. Take an IELTS practice test — free, no account required.