Most IELTS vocabulary advice is a list of impressive words to memorise. The problem is that the exam doesn’t reward impressive words. It rewards words you can use correctly, in the right combination, and recognise when they are paraphrased. That takes a different kind of practice, and it fits in 15 minutes a day.
This guide explains where vocabulary counts in the exam, which words to learn first, and a daily routine you can start today.
Where vocabulary counts in IELTS
Vocabulary matters in all four parts of the test, but in different ways.
| Part | How vocabulary is tested |
|---|---|
| Listening (40 questions) | You hear one word and the question uses another. Recognising synonyms and paraphrases is half the skill. |
| Reading (40 questions) | Same idea: the answer is rarely written with the question’s words. Academic texts also use a lot of formal vocabulary. |
| Writing (2 tasks) | Lexical Resource is one of the four marking criteria, so it is a quarter of your Writing score. |
| Speaking (3 parts) | Lexical Resource is again one of the four criteria, a quarter of your Speaking score. |
What examiners look for in Lexical Resource is range and precision. At higher bands, the public band descriptors ask for less common words used with awareness of style and collocation. Rare words used in the wrong way don’t help: they are errors. Ten words you can use well are worth more than fifty you half know.
Which words to learn first
1. The Academic Word List
The Academic Word List (Averil Coxhead, 2000) is a set of 570 word families that appear again and again in academic texts across subjects, beyond the most common English words. Words like achieve, constraint, emerge, enhance, facilitate and implement show up constantly in Academic Reading and are exactly the “less common” vocabulary that lifts a Task 2 essay when used correctly.
You don’t need all 570 families at once. Start with the ones you half-recognise: you’ve seen them, but you couldn’t use them in a sentence.
2. Word families, not single words
IELTS punishes the wrong form of a word you know. Learn each word with its family:
| Verb | Noun | Adjective |
|---|---|---|
| analyse | analysis | analytical |
| emphasise | emphasis | emphatic |
| differ | difference | different |
| economise | economy | economic / economical |
Watch the traps: economic is about the economy (economic growth), economical means it saves money (an economical car). Affect is usually the verb and effect the noun.
3. Collocations: the words that go together
Many vocabulary mistakes are not wrong words but wrong partners. Examiners notice natural combinations:
- have an impact on (not make an impact to)
- pose a threat to
- play a role in
- raise awareness of
- meet the demand for
- do or conduct research (not make research)
- a growing number of
When you save a new word, save the two or three words around it too.
4. Topic words for the essays and Speaking
The same topics come up again and again: education, work, technology, health, the environment, cities and transport, crime, the media, globalisation. Build a small set of words for each one. You will reuse them in Task 2 and in Speaking Part 3.
5. Paraphrases for the words you already use
Half of a higher band is replacing basic words with precise ones, without changing the meaning:
| Basic | More precise | Careful |
|---|---|---|
| increase | rise, grow, go up | rise is intransitive: prices rise, you don’t rise prices |
| important | significant, crucial | crucial means very important; don’t use it for everything |
| show | demonstrate, indicate | indicate is weaker: it suggests, it doesn’t prove |
| help | facilitate | formal; you facilitate a process, not a person |
| start | begin, commence | commence sounds stiff in Speaking |
| enough | adequate, sufficient | both are formal; fine in Writing |
A 15-minute daily routine
| Minutes | What to do |
|---|---|
| 0–5 | Review. Look at the words that are due today and try to recall each meaning before you check. Forgot one? Look at its sentence again, and it comes back tomorrow. |
| 5–10 | Read and save. Read one short IELTS-style text: a passage from a practice test, or a news article on an IELTS topic. Save 3–5 words with the sentence they were in, plus their family and one collocation. |
| 10–15 | Use them. Write two or three sentences answering a Task 2-style question with today’s words, or talk for one minute on a Part 2 topic and use at least two of them. |
The first five minutes are the ones people skip, and they matter most. In Lexigo’s own data, 68% of the words learners save are never reviewed, and a word you see once fades within days. Reviewing the next day, then about a week later, then after about two weeks, is what moves a word from “I’ve seen it” to “I can use it”.
Once a week, take one topic and check your words in a learner’s dictionary: the examples there show the collocations examiners expect.
Start with a list, then add your own words
If you don’t know where to start, Lexigo’s free IELTS vocabulary list has 40 essential words for Academic and General Training. All of them are B2 to C2, and most come from the Academic Word List. Each word has its meaning, its level, an example sentence and audio. When you add the list to a free account, the words come 10 a day in short reviews, on your phone or your computer, with the same schedule as above.
The words that stick best, though, are the ones you meet in your own reading. With the Lexigo browser extension, you can select any word in a practice passage or an article, see what it means in that sentence, and save it with the sentence. It then comes back in the same daily review as the list.
Preparing for the TOEFL too? There is a TOEFL vocabulary list with 61 high-frequency academic words.
Frequently asked questions
How many words do I need for IELTS band 7?
IELTS doesn’t publish a word list or a target number of words. What examiners mark is how you use words: range, precision and natural combinations. A solid base is the most common few thousand English words, plus the Academic Word List and the vocabulary of the common topics. Beyond that, using the words you know accurately raises your score more than adding rare ones.
Is the Academic Word List enough for IELTS?
No list is enough on its own, but the Academic Word List is the best single place to start for the Academic test: its words fill Academic Reading passages and make a Task 2 essay sound academic. Add topic vocabulary for Writing and Speaking, and the words you meet in your own practice reading.
Should I use rare words to get a higher band?
Only when you are sure of their meaning and how they combine with other words. Less common vocabulary helps at higher bands, but a rare word used in the wrong way counts as an error. A precise common word is better than an impressive wrong one.
Is vocabulary different in IELTS Academic and General Training?
Listening and Speaking are the same in both. Reading and Writing differ: General Training reading uses everyday and work texts, and its Writing Task 1 is a letter, so it needs less academic vocabulary. The Academic Word List helps most for the Academic test, but the review routine works for both.
How long does it take to learn IELTS vocabulary?
With 5–10 new words a day and daily reviews, you can learn a list like Lexigo’s 40 IELTS words in about a week, and 300–500 new words in two to three months. What decides whether they stay is the review the next day and the week after, not how many you add.
