There is no official IELTS word list, and no number of words that guarantees a band. What IELTS scores is how you use words. In Writing and Speaking, vocabulary is marked as Lexical Resource, one of four equally weighted criteria, so it makes up about a quarter of each of those scores. In Listening and Reading, nobody scores your vocabulary directly, but the questions rarely repeat the words of the recording or text: you need to recognise the same idea said in other words.
This guide shows what the band descriptors reward, gives 30 topic collocations with example sentences, and links to the word lists for each part of the test.
Where vocabulary counts in IELTS
| Part | How vocabulary counts | Where to go next |
|---|---|---|
| Listening | You catch an answer said in other words, and you spell it correctly: a misspelled word scores 0 | Listening spelling |
| Reading | Questions paraphrase the text, so you match ideas, not identical words | Reading question types |
| Writing | Lexical Resource is 1 of 4 criteria in each task | Task 1 vocabulary, Task 2 vocabulary |
| Speaking | Lexical resource is 1 of 4 criteria | Idioms for Speaking |
What band 6, 7 and 8 ask for
The official Writing band descriptors never ask for rare words on their own. Here is what the Task 2 Lexical Resource column says about word choice:
| Band | What the descriptor says | What it means for you |
|---|---|---|
| 5 | "frequent simplifications and/or repetitions" | The same few words again and again |
| 6 | "a lack of precision in word choice" | The meaning is clear, but the words are general |
| 7 | "some ability to use less common and/or idiomatic items"; "an awareness of style and collocation is evident" | Less common words that fit the style and their usual partner words |
| 8 | "skilful use of uncommon and/or idiomatic items when appropriate" | Uncommon words only where they fit |
Speaking uses the same idea. At band 7 you use some less common and idiomatic items and show an awareness of style and collocation; at band 8 you use a wide vocabulary to convey precise meaning (Speaking band descriptors).
Two words in those descriptors matter most:
- Collocation: words that naturally go together. You make a decision, not do one; traffic is heavy, not strong. A wrong partner word is an error even when each word is correct.
- Style: a word must fit the tone. Kids and stuff are fine in Speaking Part 1 and too informal in a Task 2 essay.
So the goal is precision: the right word with the right partner, in the right tone.
What GoPrep data shows
In 8,073 Task 2 essays scored by the GoPrep AI examiner (28 July to 26 September 2026), a lot of or lots of appeared in 26% of essays below band 6.0 and in 6% of essays at 7.0 or above. Showcase words such as plethora or myriad turned up in only 1% to 2% of essays at any band. Neutral words like people and problem stayed common at every band. We counted whether a word appears, not whether each use was right, so read this as a pattern: higher bands go with fewer vague words, not with rarer ones.
Speaking shows the same thing from another side. In 6,064 first full Speaking mock tests on GoPrep in the same period, idioms were named in the AI examiner's priority fixes only 11 times, while fixes for word choice or natural word pairs were listed in 25% to 58% of tests, depending on the band. The full figures are in Task 2 vocabulary and Idioms for Speaking.
IELTS vocabulary by topic: 30 collocations
These six topics come up again and again in Writing Task 2 and Speaking Part 3. For each one, here are five natural word pairs with an example you can adapt. Learn the whole pair, not the single word.
Education
| Collocation | Example |
|---|---|
| higher education | Access to higher education has widened in many countries. |
| tuition fees | High tuition fees can stop talented students from applying. |
| acquire skills | Students acquire practical skills faster through projects. |
| drop out of school | Some teenagers drop out of school to support their families. |
| compulsory education | In many countries, compulsory education ends at around 16. |
Technology
| Collocation | Example |
|---|---|
| rely heavily on | Many young people rely heavily on their phones for news. |
| screen time | Parents often try to limit their children's screen time. |
| data privacy | Data privacy has become a major concern for internet users. |
| remote work | Remote work saves commuting time but can isolate employees. |
| the digital divide | The digital divide leaves rural areas with slower internet. |
Environment
| Collocation | Example |
|---|---|
| carbon emissions | Governments have pledged to cut carbon emissions. |
| renewable energy | Many countries are investing in renewable energy such as solar and wind. |
| reduce waste | Shops can reduce waste by selling products without packaging. |
| endangered species | Habitat loss is one of the main threats to endangered species. |
| climate change | Climate change is making heatwaves more frequent. |
Health
| Collocation | Example |
|---|---|
| a balanced diet | A balanced diet matters more than any single superfood. |
| a sedentary lifestyle | Office work often leads to a sedentary lifestyle. |
| mental health | Schools are paying more attention to students' mental health. |
| life expectancy | Life expectancy has risen in most countries over the past century. |
| public healthcare | Public healthcare should be free at the point of use. |
Work
| Collocation | Example |
|---|---|
| job security | Many graduates value job security more than a high salary. |
| work-life balance | Flexible hours can improve work-life balance. |
| career prospects | Learning a second language can improve your career prospects. |
| earn a living | More people now earn a living from freelance work. |
| flexible working hours | Flexible working hours help parents with young children. |
Cities and transport
| Collocation | Example |
|---|---|
| traffic congestion | Traffic congestion adds hours to commuters' week. |
| public transport | Cheap public transport takes cars off the road. |
| affordable housing | Young workers struggle to find affordable housing in big cities. |
| commute to work | Many people commute to work for over an hour each way. |
| urban sprawl | Urban sprawl pushes new homes further from city centres. |
Words to stop using in a Task 2 essay
You don't need to replace every basic word: people, important and problem are fine when nothing fits better. Replace the vague and informal ones.
- a lot of → many, much, a large number of
- thing → name it: factor, habit, device
- get → become, receive, find (a job)
- very good → say how: beneficial, effective
- big → large, major, significant
- kids, stuff → children, a specific noun
Synonyms by meaning and the look-alike words that cost marks (affect and effect, economic and economical) are in Task 2 vocabulary. Words that link ideas are in linking words for Task 2.
How to learn IELTS vocabulary so it sticks
- Learn pairs, not single words. Write make a decision, not decision. The partner word is what the examiner checks.
- Write your own sentence. One sentence about your life or your city for every new pair. If you can't write it, you can't use it in the exam yet.
- Review on a schedule. Look at new words again the next day, a few days later and a week later. Short, spaced reviews beat one long session.
- Learn from your own mistakes. Every word your teacher or the AI examiner marks in your essay or answer goes into your list with the correct version.
- Read and listen on IELTS topics. News articles and podcasts on education, health or technology show you the same collocations in context.
- Use it the same week. A new pair in your next essay or Speaking practice is worth ten pairs you only read.
Twenty pairs you can use correctly are worth more than two hundred you only recognise.
Books for IELTS vocabulary
If you prefer a book with exercises, these are written for IELTS and come with answer keys:
- Vocabulary for IELTS by Pauline Cullen (Cambridge University Press), with an Advanced level for higher bands.
- Vocabulary for IELTS by Anneli Williams (Collins).
- Essential Words for the IELTS by Lin Lougheed (Barron's).
We don't link to free PDF copies: most of them are pirated. Buy the book or borrow it from a library, and work through it with your own example sentences. More on choosing books: best IELTS books.
FAQ
Is there an official IELTS vocabulary list?
No. IELTS does not publish a word list. Vocabulary is scored by how precisely and naturally you use words, described in the Lexical Resource band descriptors.
How many words do I need for IELTS band 7?
No official number exists. The band 7 descriptor asks for some less common and idiomatic words used with an awareness of style and collocation, so how precisely you use words matters more than how many you know.
Do idioms raise my IELTS score?
Only when they fit naturally. Band 7 mentions idiomatic items, but a forced or wrong idiom counts as an error, and a precise ordinary word is safer.
What is Lexical Resource in IELTS?
Lexical Resource is the vocabulary criterion in Writing and Speaking. It is one of four equally weighted criteria and covers range, precision, collocation, style and spelling or word formation.
What is the best book for IELTS vocabulary?
Popular choices are Vocabulary for IELTS by Pauline Cullen (Cambridge), Vocabulary for IELTS by Anneli Williams (Collins) and Essential Words for the IELTS (Barron's). Pick one and use it with your own example sentences.
Where to go next
For charts and graphs, see Task 1 vocabulary. For essays, Task 2 vocabulary and linking words. For Speaking, idioms that help and idioms that hurt. To fit vocabulary work into the weeks before your exam, tell the quiz your target score and exam date, and GoPrep will build a personal study plan.
GoPrep Team
GoPrep guide authors
We write about IELTS preparation using platform data and official exam materials.
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