What graph vocabulary needs to do
In Academic Writing Task 1 you describe visual information, such as a line graph, bar chart, table or pie chart, in your own words. Good vocabulary here is not about rare words. It is about choosing accurate words for what the data shows, and varying them so you do not repeat the same verb in every sentence.
Check the official IELTS organisers for the current task requirements and assessment criteria. This article focuses on language you can practise.
Verbs and nouns for change
Many verbs have a matching noun, so you can switch the sentence structure to avoid repetition.
| Direction | Verb | Noun |
|---|---|---|
| Up | rise, increase, grow, climb | a rise, an increase, growth, a climb |
| Down | fall, decrease, decline, drop | a fall, a decrease, a decline, a drop |
| Little change | remain stable, stay constant, level off | stability, a levelling off |
| Up and down | fluctuate | fluctuations |
Two sentences, same information:
- The number of visitors rose to 40,000. (verb)
- There was a rise in the number of visitors, to 40,000. (noun)
Using both forms shows control of grammar as well as vocabulary.
Adjectives and adverbs
Adverbs and adjectives describe how big or how fast a change was. Choose them to match the data.
- Large or fast: sharply, dramatically, significantly, considerably
- Moderate: noticeably, steadily
- Small or slow: slightly, gradually, marginally, modestly
The adverb goes with a verb (rose sharply) and the adjective goes with a noun (a sharp rise). A frequent mistake is mixing them: “a sharply rise” is wrong.
Be careful with strong words such as “soar”, “plummet” or “skyrocket”. If the change on the graph is modest, they give a false picture. A precise, calm word is better than a dramatic one that is not supported.
Peaks, lows and turning points
- Highest point: peak at, reach a peak of, hit a high of
- Lowest point: reach a low of, bottom out at, hit a low of
- Short fall followed by recovery: dip
- Flat stretch: plateau, remain level
- Change of direction: reverse, recover, rebound
Describe the highest and lowest points of the main lines when they are clear. These are often key features worth reporting.
Time phrases
Time language places your description on the timeline.
- between 2000 and 2010, from 2000 to 2010
- over the period shown, throughout the period
- by 2015, in the following years
- at the beginning of the period, by the end of the period
- in the first half, during the final year
Match prepositions carefully: in 2010, by 2010 (no later than), from … to …, between … and ….
Comparing and approximating
Not every chart shows change over time. For bar charts, tables and pie charts, you need comparison language.
- Comparing: higher than, lower than, twice as high as, the highest, the lowest, the second largest, similar to, in contrast, whereas
- Approximating: about, around, roughly, approximately, just under, just over, nearly, almost, slightly above
- Proportions: a quarter, a third, the majority, a small minority, just over half
Approximating language is useful because chart readings are often not exact. Use “approximately 20 percent” instead of guessing “20.3 percent” unless a figure is labelled.
Linking your ideas also matters. See our guide to IELTS writing linking words for contrast and sequence linkers such as “whereas” and “followed by”. If your task is a process rather than data, use flow chart vocabulary.
Tense and word form
- Use the past simple for completed past periods: sales rose in 2018.
- Use the present perfect or present for current or “up to now” situations when the data supports it.
- Use the future for projections: is expected to reach, is predicted to fall.
- Keep verb forms accurate. “Fell” is the past of “fall”; “fallen” needs “have” or “had”.
- Take care with subject-verb agreement: The number of cars increased (not “increase”).
- Spell carefully. Spelling errors in common words such as “fluctuate” or “decrease” are easy to avoid.
Original example sentences
These are for illustration, with invented data.
- Between 2005 and 2015, the number of cyclists in the city rose steadily from about 20,000 to around 35,000.
- After peaking at roughly 50 in March, sales dipped slightly before recovering in June.
- Coffee consumption remained stable throughout the period, whereas tea consumption fluctuated.
- Just under half of respondents chose option A, compared with a quarter for option B.
- Rail travel is expected to grow gradually over the next decade.
Common mistakes
- Repeating the same verb in every sentence.
- Mixing up adjective and adverb forms.
- Using “increase” for something that fell, or the reverse. Always check the direction.
- Exaggerating with “dramatic” when the change is small.
- Listing every number rather than selecting key features.
- Giving reasons or opinions that the graph does not show.
Practice routine
- Find a sample chart from a past-paper source or practice book. Write three sentences for the main trend using three different structures.
- Rewrite each sentence using the noun form instead of the verb.
- Underline every adverb and check that it matches the size of the change.
- Make your own vocabulary table sorted by direction and size, and add new words you meet in model answers. To review the table efficiently, see our study skills guide.
- Compare your paragraph with a trusted model and note any accuracy errors.
FAQ
Can I use the same verb more than once? Yes, if no good alternative exists. Avoid repeating it in every sentence.
Do I need to learn very advanced words? Not necessarily. Accurate common words are better than wrong advanced ones.
Does the same vocabulary work for bar charts? Much of it does when the bars show change over time. For static data, rely more on comparison and proportion language.