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IELTS vocabulary isn’t about memorising thousands of rare words. It’s about using the right words accurately, flexibly and in the right context. This guide covers the vocabulary that matters for Writing and Speaking, six topic word banks, the collocations that make English sound natural, common mistakes, and how to learn new words so they stick.
Many students either use impressive words they don’t fully control or avoid anything unfamiliar. Both hold your score back. Every word below comes with an example sentence, so you can see how it’s actually used.
Vocabulary (Lexical Resource) is a quarter of your Writing and Speaking bands, and it’s marked on the range, precision and appropriacy of the words you use, not on how many rare words you know. Learn words in context with their collocations (“make a decision”, “raise awareness”), and use each new word in your own sentence straight away.
How IELTS Lexical Resource Is Assessed
Vocabulary is assessed as Lexical Resource, one of the four criteria in both Writing and Speaking. See the official Writing resources and Speaking band descriptors. In practice, examiners are looking at four things:
- Range: do you use a variety of words, or repeat the same ones? Using “increase” five times, when you could also use “rise”, “grow”, “climb” and “surge”, shows a limited range.
- Accuracy: do you use words correctly? An impressive word used wrongly is worse than a simple word used accurately.
- Flexibility: can you paraphrase, finding another way to say something when you don’t know the exact word? It’s one of the most valuable vocabulary skills in IELTS.
- Collocation: do your word combinations sound natural? English speakers say “make a decision”, not “do a decision”, and “heavy rain”, not “strong rain”.
Only use a word if you know exactly what it means, how to use it in a sentence, and which words it naturally goes with. A less common word isn’t automatically better: choose the one that says what you mean, accurately.
IELTS Writing Vocabulary: Task 1 and Task 2
Task 1: Describing Trends and Data
| Function | Vocabulary | Example sentence |
|---|---|---|
| Sharp increase | surged, soared, rocketed, jumped sharply | Sales surged to 4.5 million in 2019. |
| Gradual increase | rose steadily, climbed gradually, increased moderately | The number of users rose steadily over the decade. |
| Sharp decrease | plummeted, fell sharply, dropped dramatically | Production costs plummeted after the new system was introduced. |
| Gradual decrease | declined gradually, decreased slightly, fell marginally | Attendance declined gradually between 2010 and 2015. |
| No change | remained stable, levelled off, stayed constant, plateaued | Temperatures remained stable throughout July. |
| Fluctuation | fluctuated, varied considerably, oscillated | The exchange rate fluctuated throughout the period. |
| Peak | reached a peak of, hit a high of, peaked at | Visitor numbers peaked at 3.2 million in 2018. |
| Low point | fell to a low of, reached its lowest point, bottomed out at | Exports fell to a low of $2 billion in 2009. |
| Proportion | accounted for, represented, comprised, constituted | Renewable energy accounted for 32% of total output. |
| Comparison | in contrast, by comparison, whereas, while | In contrast, the UK recorded significantly lower figures. |
The example figures are for illustration only.
Task 2: Essay Vocabulary
| Function | Vocabulary | Example sentence |
|---|---|---|
| Introducing a point | One significant factor is…, A key consideration is…, It is worth noting that… | One significant factor is the role of government policy. |
| Adding a point | Furthermore, Moreover, In addition, Additionally | Furthermore, this approach has worked well in several countries. |
| Contrasting | However, Nevertheless, On the other hand, Conversely | However, critics argue that the costs outweigh the benefits. |
| Giving a reason | This is largely due to…, This can be attributed to…, As a result of… | This is largely due to the rapid expansion of digital infrastructure. |
| Giving an example | For instance, For example, A case in point is…, To illustrate… | For instance, many universities now offer their lectures online. |
| Concluding | In conclusion, To summarise, On balance, All things considered | On balance, the advantages of this approach outweigh the drawbacks. |
| Hedging | It could be argued that…, This may suggest…, It appears that… | It could be argued that social media has changed public debate. |
| Emphasis | It is particularly important that…, What is especially notable is…, Crucially… | Crucially, a link between two trends does not prove that one causes the other. |
Vary these: starting every paragraph with “Furthermore” or “However” shows a limited range.
IELTS Speaking Vocabulary
Speaking vocabulary is different from writing vocabulary. In the Speaking test you need words you can find instantly, under pressure, without stopping to think. The goal is natural, varied and confident English, not academic English.
Expressing Opinions in Parts 1 and 3
| Function | Phrases |
|---|---|
| Giving an opinion | Personally, I think… / From my perspective… / As far as I’m concerned… / I’d say… |
| A strong opinion | I strongly believe that… / I’m absolutely convinced that… / There’s no doubt in my mind that… |
| An uncertain opinion | I’m not entirely sure, but… / It’s hard to say, but… / I suppose… |
| Agreeing | I completely agree… / That’s a really valid point… / I couldn’t agree more… |
| Disagreeing politely | I see your point, but… / I’d actually argue the opposite… / With respect, I think… |
| Acknowledging complexity | It’s a complex issue… / There are two sides to this… / It really depends on… |
Phrases for giving and discussing opinions.
Buying Time: Natural Thinking Phrases
| Phrase | When to use it |
|---|---|
| That’s an interesting question… | To give yourself a second before an unexpected question |
| Let me think about that for a moment… | When you need a few seconds to organise your thoughts |
| I’ve never really thought about it that way, but… | When a question surprises you |
| Off the top of my head, I’d say… | When you’re giving an immediate, informal answer |
| What I mean is… | When you want to make something you’ve just said clearer |
Use one to start an answer, not instead of one.
Topic Vocabulary: Six Practice Word Banks
These themes come up often in practice materials, but no list can predict your test questions. Learn each word with its example, then write a sentence of your own.
Technology
| Word or phrase | Meaning | Example |
|---|---|---|
| proliferation | a rapid increase in number | The proliferation of smartphones has transformed communication. |
| digital divide | the gap between those with and without access to technology | The digital divide remains a serious challenge in rural areas. |
| automation | the use of machines and software to do work people once did | Automation is changing the kinds of jobs available in factories. |
| surveillance | the monitoring of people’s activity | The expansion of state surveillance raises serious privacy concerns. |
| misinformation | false information, often spread online | Social media platforms struggle to contain the spread of misinformation. |
Technology word bank
Environment
| Word or phrase | Meaning | Example |
|---|---|---|
| carbon emissions | greenhouse gases released by burning fossil fuels | Reducing carbon emissions is central to international climate agreements. |
| biodiversity | the variety of plant and animal life in an area | Deforestation threatens biodiversity in tropical regions. |
| renewable energy | energy from sources that are naturally replenished | Investment in renewable energy has grown significantly in recent years. |
| sustainable | able to continue without using up resources | Governments are under pressure to adopt more sustainable policies. |
| ecological footprint | the environmental impact of a person or group | Wealthier lifestyles usually leave a larger ecological footprint. |
Environment word bank
Education
| Word or phrase | Meaning | Example |
|---|---|---|
| critical thinking | the ability to analyse and evaluate information | Many employers value critical thinking more than memorised facts. |
| curriculum | the subjects and content taught in a school | There are calls to add financial literacy to the curriculum. |
| rote learning | memorising without understanding | Critics argue that rote learning stifles creativity. |
| vocational training | education in practical, job-specific skills | Vocational training offers an alternative to university. |
| academic achievement | success measured by grades and qualifications | Academic achievement alone does not guarantee professional success. |
Education word bank
Health
| Word or phrase | Meaning | Example |
|---|---|---|
| sedentary lifestyle | a way of life with little physical activity | Office work often leads to a sedentary lifestyle. |
| mental health | emotional and psychological wellbeing | Schools are paying more attention to students’ mental health. |
| preventable disease | an illness that can be avoided through lifestyle or vaccination | Vaccination programmes protect children from preventable diseases. |
| public health campaign | an organised effort to improve people’s health | A public health campaign can encourage people to stop smoking. |
| healthcare infrastructure | the systems and facilities that support medical care | Rural areas often lack basic healthcare infrastructure. |
Health word bank
Society and Culture
| Word or phrase | Meaning | Example |
|---|---|---|
| globalisation | the increasing connection of economies and cultures | Globalisation has made foreign food and films part of everyday life. |
| social cohesion | the bonds that unite members of a community | Shared public spaces can strengthen social cohesion. |
| urbanisation | the movement of people from rural to urban areas | Rapid urbanisation puts pressure on housing and transport. |
| gender equality | equal rights and opportunities regardless of gender | Progress on gender equality has been uneven across regions. |
| intergenerational | involving different generations | Intergenerational living is still common in many Pakistani families. |
Society and culture word bank
Work and Economy
| Word or phrase | Meaning | Example |
|---|---|---|
| labour market | the supply of and demand for workers | The labour market is changing in response to automation. |
| entrepreneurship | starting and running a business | Many governments encourage entrepreneurship to create jobs. |
| income inequality | an unequal spread of earnings across a population | Income inequality can limit people’s access to good education. |
| remote work | working from somewhere other than a central office | Remote work has become normal in many professional sectors. |
| work-life balance | a healthy balance between work and personal time | Work-life balance is now a key consideration for job seekers. |
Work and economy word bank
Using Collocations Naturally
A collocation is a pair or group of words that naturally go together. A wrong combination usually still makes sense, but it sounds unnatural, and repeated slips can lower your Lexical Resource score.
| Natural expression | The alternative | How to use it |
|---|---|---|
| make a decision | do a decision | “Make a decision” is the natural form; “do a decision” isn’t used |
| take responsibility | do responsibility | “Take responsibility” is the natural form |
| heavy traffic | strong traffic | “Heavy traffic” is the usual phrase for busy roads |
| raise awareness | increase awareness | Both are correct; see Collins collocations |
| strong argument | powerful argument | Both are natural, depending on context; see Cambridge examples |
| reach a conclusion | arrive at a conclusion | Both are correct; “arrive to a conclusion” isn’t |
| very concerned | deeply concerned | Both are correct; “deeply” is stronger |
| pose a threat | create a threat | “Pose a threat” is the established expression |
| tackle a problem | handle a problem | Both work: “tackle” means actively deal with it, “handle” means manage it |
| rapid growth | fast growth | Both are fine; “rapid growth” suits formal writing better |
Some pairs are both correct; others have one clearly natural form.
The best way to learn collocations is through reading: notice which words appear together in well-written English, and learn them in whole sentences, not in isolation.
Common IELTS Vocabulary Mistakes
“The government has ubiquitous the problem of poverty.” “Ubiquitous” means “present everywhere”, and it’s an adjective, not a verb. “The government has addressed the problem of poverty” is simpler and far better. A wrong word choice costs more than a simple word used well.
Repetition makes writing feel limited, but synonyms aren’t always interchangeable. Replace a repeated word only with one that keeps your exact meaning; forcing a synonym often creates a new error.
Phrases such as “do the needful” and “revert” (meaning “reply”) are common in South Asian English, but they can confuse an international examiner. “Take the necessary steps” and “reply” or “respond” are clearer.
“Very” and “a lot” aren’t wrong, but more precise words often say more: “extremely difficult” or “considerably more” instead of “very hard” or “a lot more”. Choose them only when they fit your meaning exactly.
How to Build Your IELTS Vocabulary Effectively
- Learn words in context, not from lists. When you meet a useful word, note the sentence it was in, then write a sentence of your own with it.
- Learn collocations with every new word. When you learn “raise”, learn that it goes with “awareness”, “concerns”, “questions” and “funds”. When you learn “pose”, note “a threat”, “a risk” and “a challenge”.
- Read good English every day. Newspapers, magazines and articles on subjects that interest you all count. Note the useful words and phrases you find.
- Use a new word quickly. Say it or write it in a sentence soon after you learn it; using a word is what makes it stick.
- Review at spaced intervals. For example, revisit a new word after 1, 3, 7 and 14 days, each time with a fresh example sentence.
- Don’t try to memorise a vocabulary book from cover to cover. Use it as a reference for the topics you need. How well you use words matters more than how many you know.
Books such as Cambridge Vocabulary for IELTS and Collins Vocabulary for IELTS are useful references, though not official IELTS materials. For official sample tasks, see the IELTS preparation resources. Want this guide as a PDF? Use your browser’s Print option and choose “Save as PDF”.
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