Word List · Learning
40 IELTS Vocabulary Words
The most useful IELTS vocabulary is task-specific. Writing Task 1 needs trend verbs like surge, decline, and plateau; essays need argument verbs like assert and contend, cause-and-effect phrases like stem from, and formal linking adverbs like consequently. Learning words by task — each with an example sentence — works far better than memorising a general list.
Who it’s for: Students preparing for IELTS, TOEFL, and other academic English exams.
When this list helps
- Describe graphs and trends in IELTS Writing Task 1
- Build formal vocabulary for essays and speaking
- Learn precise verbs for argument and cause-and-effect
- Revise high-value exam words with example sentences
| Word | Part of speech | Meaning | Example |
|---|---|---|---|
| fluctuate | verb | To rise and fall irregularly in number or amount. | Oil prices fluctuated throughout the decade, ranging from 40 to 110 dollars a barrel. |
| surge | verb / noun | To increase suddenly and strongly; a sudden large increase. | The number of online shoppers surged between 2019 and 2021. |
| decline | verb / noun | To decrease gradually; a gradual fall in amount or quality. | Cinema attendance declined steadily between 1990 and 2005. |
| plateau | verb / noun | To stop rising and stay at the same level after a period of growth. | Sales grew rapidly at first, then plateaued at around 20,000 units a month. |
| plummet | verb | To fall suddenly and steeply. | The birth rate plummeted during the crisis, dropping by nearly a third in five years. |
| dip | verb / noun | To fall slightly, usually for a short time. | Visitor numbers dipped in the winter months before recovering in spring. |
| peak | verb / noun | To reach the highest point or value. | Energy consumption peaked at midday and fell sharply after 6 pm. |
| remain steady | phrase | To stay at roughly the same level, without significant change. | Unemployment remained steady at around five per cent for the rest of the period. |
| assert | verb | To state firmly and confidently that something is true. | Supporters of the ban assert that it will reduce pollution in city centres. |
| contend | verb | To argue or claim something, especially in a disagreement. | Critics contend that the policy benefits large companies far more than workers. |
| advocate | verb | To publicly support an idea, policy, or course of action. | Many health experts advocate a tax on sugary drinks. |
| undermine | verb | To weaken something gradually, such as an argument, authority, or system. | Allowing too many exceptions would undermine the purpose of the law. |
| maintain | verb | To continue to state an opinion firmly, even when others disagree. | Opponents maintain that longer prison sentences do little to prevent crime. |
| refute | verb | To prove that a claim or argument is wrong. | Recent research refutes the idea that screen time alone causes poor sleep. |
| acknowledge | verb | To accept that something is true, often before presenting a counterargument. | While I acknowledge that the scheme is costly, its long-term benefits justify the investment. |
| trigger | verb / noun | To cause something to happen, often suddenly; the thing that causes it. | The announcement triggered a wave of protests across the country. |
| stem from | phrase | To be caused by or develop from something. | Many urban problems stem from planning decisions made decades ago. |
| give rise to | phrase | To cause something to exist or happen. | The growth of remote working has given rise to new questions about work-life balance. |
| lead to | phrase | To result in a particular outcome, often through a chain of events. | A poor diet in childhood can lead to serious health problems later in life. |
| result in | phrase | To have something as a direct outcome. | Investment in public transport resulted in a sharp fall in traffic congestion. |
| attribute to | phrase | To say or believe that something is caused by a particular thing. | The rise in life expectancy is often attributed to better healthcare and nutrition. |
| whereas | conjunction | Used to contrast two facts or situations. | Whereas car ownership rose in rural areas, it fell slightly in the cities. |
| conversely | adverb | Used to introduce a statement that reverses or contrasts the previous one. | Spending on printed books fell over the period; conversely, spending on e-books tripled. |
| similarly | adverb | In a similar way; used to add a comparable point. | Japan invests heavily in high-speed rail; similarly, France has expanded its network. |
| by contrast | phrase | Used to show how two things differ sharply. | Coal use halved over the period; by contrast, solar energy grew tenfold. |
| disparity | noun | A large and noticeable difference, especially one seen as unfair. | There is a clear disparity between average wages in the north and south of the country. |
| comparable | adjective | Similar enough to be compared fairly. | The two cities have comparable populations but very different transport systems. |
| demonstrate | verb | To show something clearly, especially with evidence. | The graph demonstrates a clear link between income and life expectancy. |
| illustrate | verb | To make something clear using examples, charts, or evidence. | The chart illustrates how energy consumption varied across the five countries. |
| facilitate | verb | To make a process or action easier. | Online platforms facilitate communication between students and teachers. |
| implement | verb | To put a plan, policy, or decision into effect. | Several cities have implemented congestion charges to reduce traffic. |
| mitigate | verb | To make something harmful less severe. | Governments can mitigate the effects of climate change by investing in renewable energy. |
| exacerbate | verb | To make a problem or bad situation worse. | Building more roads may exacerbate congestion rather than relieve it. |
| constitute | verb | To form or make up a part of a whole. | Young adults constitute the largest group of social media users. |
| consequently | adverb | As a result of what has just been mentioned. | Fuel prices rose sharply; consequently, demand for public transport increased. |
| nevertheless | adverb | In spite of what has just been said; even so. | The scheme is expensive; nevertheless, its benefits outweigh the costs. |
| admittedly | adverb | Used to concede a point that weakens your own argument. | Admittedly, the initial cost is high, but the savings over time are considerable. |
| arguably | adverb | Used to soften a strong claim that can be supported with reasons. | Arguably, education is the most effective tool for reducing inequality. |
| undoubtedly | adverb | Certainly; without any doubt. | Undoubtedly, the internet has transformed the way people access information. |
| notably | adverb | Especially; used to single out an important example. | Several countries, notably Sweden and Denmark, have invested heavily in wind power. |
Writing tip: Examiners reward accuracy over ambition — only use a word you can control, and practise each one in a full sentence before exam day.
Source & usage note
These word list entries are curated for learning and writing. Where a full Word Explorer page exists, the word links to deeper information. Word-game acceptance can vary by dictionary, region, and rule set.
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FAQ
Questions people ask
How should I use 40 IELTS Vocabulary Words for Writing and Speaking?
Scan the list for words that fit your purpose, then use the filter box to narrow by meaning, part of speech, or spelling pattern.
Are these words accepted in every word game?
No. Word game acceptance depends on the specific game dictionary and rule set.
Can I copy words from the list?
Yes. You can select and copy words directly from the table for study notes, lesson plans, or drafting.