Most Band 6 candidates describe every chart the same way: “increased”, “decreased”, repeat. The difference between a 6 and a 7 in Lexical Resource often comes down to how many IELTS Task 1 vocabulary phrases you can deploy with precision. This post gives you the complete toolkit — over 50 expressions covering trend verbs, noun forms, degree modifiers, and bar chart comparison phrases — each with a short example sentence so you can see exactly how to use it on exam day.
Why Trend Vocabulary Matters in Task 1
Task 1 asks you to report the key features of a visual data source in at least 150 words. Examiners mark you on four criteria: Task Achievement, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. A narrow range of vocabulary — writing “increased” ten times, for example — directly limits your Lexical Resource score.
Understanding why IELTS writing prep is different from other English practice helps here. Task 1 is not about opinion or argument; it is about accurate, varied description. The good news is that the vocabulary set is finite and learnable. Once you have internalised the core trend verbs, their noun equivalents, and a solid bank of comparison phrases, you can apply them to almost any chart you encounter.
Core Trend Verbs and Their Noun Forms
Every trend description you write will rely on a small set of high-frequency verbs. Learning both the verb form and the noun form doubles your flexibility, because you can structure sentences in two ways:
- Verb structure: “Sales rose sharply in 2019.”
- Noun structure: “There was a sharp rise in sales in 2019.”
Rise and Fall
Rise / Increase / Go up (verb) — a rise / an increase (noun)
These describe upward movement.
- “The proportion of online shoppers rose considerably between 2010 and 2020.”
- “There was a steady increase in renewable energy output over the decade.”
Fall / Decline / Drop / Decrease (verb) — a fall / a decline / a drop / a decrease (noun)
These describe downward movement.
- “Unemployment fell dramatically after the policy change.”
- “The data show a gradual decline in coal consumption from 2005 onwards.”
Use fall and drop when the change feels sudden or notable. Use decline or decrease for a more measured, formal tone.
Fluctuate and Remain Stable
Fluctuate (verb) — fluctuation (noun)
Use these when data moves up and down without a clear direction.
- “Tourist numbers fluctuated throughout the period, peaking in summer and dipping in winter.”
- “There was considerable fluctuation in the exchange rate over the five years shown.”
Remain stable / Level off / Plateau — these describe little or no change.
- “After years of growth, production costs levelled off in 2018.”
- “Demand appeared to plateau at around 4 million units per year.”
- “The percentage of female graduates remained relatively stable throughout the 1990s.”
Peak and Bottom Out
Peak (verb) — a peak (noun): the highest point in a data set.
- “Exports peaked at $3.2 billion in 2015 before declining.”
- “The graph shows a clear peak in electricity consumption during winter months.”
Bottom out (verb) — a trough (noun): the lowest point.
- “The share price bottomed out in March 2020.”
- “Sales reached a trough in the second quarter before recovering.”
Adverbs and Adjectives: Showing Degree of Change
A trend verb alone tells an examiner that something changed. A modifier tells them how much it changed. This distinction is critical for both accuracy and lexical variety.
Strong Change
- Dramatically / sharply / steeply / significantly (adverbs)
- Dramatic / sharp / steep / significant (adjectives used with noun forms)
Examples:
- “The birth rate fell sharply between 1980 and 1990.”
- “There was a dramatic rise in smartphone ownership after 2010.”
- “Carbon emissions increased steeply over the first half of the period.”
Moderate Change
- Considerably / noticeably / moderately (adverbs)
- Considerable / noticeable / moderate (adjectives)
Examples:
- “The number of private vehicles increased considerably over the decade.”
- “There was a moderate decline in public transport usage.”
Gradual or Slight Change
- Gradually / steadily / slowly / slightly / marginally (adverbs)
- Gradual / steady / slow / slight / marginal (adjectives)
Examples:
- “Average household income rose gradually throughout the 1990s.”
- “There was a slight decrease in water consumption in the final year.”
- “The proportion of part-time workers fell marginally in 2022.”
A practical rule: if the change on the chart looks large, use a strong modifier. If it looks small, use a slight or marginal one. Mismatching modifier and data is a factual inaccuracy that costs marks.
How to Describe Overall Trends vs. Specific Data Points
Strong Task 1 responses do two things: they identify the overall trend across the whole period, and they zoom in on specific notable data points (peaks, troughs, crossover points, outliers).
Signalling an Overall Trend
Use these openers to introduce a general pattern before drilling into specifics:
- “Overall, there was a clear upward trend in…”
- “In general, the figures for X showed a steady decline throughout the period.”
- “Broadly speaking, production levels rose consistently over the twenty years shown.”
- “The most striking trend is the sharp increase in…”
Describing Specific Data Points
After the overview, reference precise figures using language like:
- “In 2015, the figure stood at 45%, before falling to 38% by 2020.”
- “The proportion reached its highest point of 62% in 2018.”
- “By the end of the period, the number had fallen to just over one million.”
- “The figure for 2010 was approximately three times higher than that recorded in 2000.”
IELTS Task 1 Bar Chart Comparison Phrases
Bar charts invite direct comparison between categories or groups. This is where a strong set of IELTS Task 1 bar chart comparison phrases becomes essential. The examiner wants to see that you can articulate similarities and differences clearly, not just list numbers.
Showing a Difference
Compared to / in comparison with — introduces a contrast between two values.
- “Compared to men, women spent significantly more time on unpaid domestic work.”
- “In comparison with the previous year, sales in 2023 were considerably lower.”
While / whereas — presents two contrasting facts in a single sentence.
- “Men preferred driving, while women were more likely to use public transport.”
- “The figure for France was 45%, whereas Germany recorded only 28%.”
In contrast / by contrast — used to open a sentence that directly opposes the previous one.
- “In contrast, the figures for rural areas showed almost no change.”
- “By contrast, energy consumption in residential buildings fell sharply.”
Significantly higher / lower than — precise comparative language.
- “The rate of home ownership in Spain was significantly higher than that in Germany.”
- “Youth unemployment was considerably lower in 2020 than in 2010.”
Marginally higher / lower than — for small differences.
- “The score for Group A was marginally higher than that of Group B.”
- “At 31%, the figure was only marginally lower than the previous year’s result.”
Showing a Similarity
Similarly / likewise — signals that two groups share a comparable pattern.
- “Similarly, the data for Canada showed a gradual rise over the same period.”
- “Likewise, car ownership in Australia increased throughout the 1990s.”
Both X and Y — bundles two subjects with the same description.
- “Both the UK and France recorded a decline in coal use after 2010.”
- “Both categories saw a peak in 2018 followed by a steady fall.”
At a similar level / at comparable rates — indicates approximate equality.
- “By 2020, both countries had reached similar levels of internet penetration.”
- “Male and female participation grew at comparable rates throughout the decade.”
Ranking and Proportion
When a bar chart shows multiple categories, examiners expect you to rank them or note their proportional relationship.
- “X accounted for the largest share, at 42%, followed by Y at 27%.”
- “The smallest proportion was recorded for Z, which stood at just 9%.”
- “X was roughly twice as high as Y.”
- “At 15%, the figure for Category C was less than half that of Category A.”
Avoiding Repetition: Varying Your Vocabulary
A common mistake in Task 1 is locking onto one or two words and repeating them throughout the response. Varying your vocabulary is not just a stylistic preference — it is a marking criterion.
Here is a practical strategy. Before you write, mentally pair up synonyms for the trends you need to describe:
| Upward movement | Downward movement | Little change |
|---|---|---|
| rise, increase, grow, climb, surge | fall, decline, drop, decrease, dip | remain stable, level off, plateau, stay constant |
Similarly, vary your comparison structures. If you used “compared to” in one sentence, switch to “whereas” or “in contrast” for the next. If you opened with a noun phrase (“There was a rise in…”), try a verb phrase next (“The figure rose…”).
A useful self-editing check: after drafting your response, highlight every word that describes movement or comparison. If the same word appears more than twice, replace at least one instance with a synonym.
Putting It All Together: A Sample Bar Chart Paragraph
Here is a short model paragraph combining trend vocabulary and bar chart comparison phrases for a hypothetical chart showing energy use in two countries:
“Overall, both countries showed an upward trend in energy consumption between 2000 and 2020, although the rate of growth differed considerably. The UK recorded a gradual rise, climbing from 250 terawatt-hours in 2000 to 310 by 2020. In contrast, Germany experienced a sharper increase, with figures surging from 300 to 430 over the same period. By 2020, Germany’s consumption was significantly higher than that of the UK, standing at nearly 40% above the UK figure.”
Notice how the paragraph opens with an overview, then zooms in on specific data, uses a mix of noun and verb structures, pairs strong modifiers with visible changes, and uses “In contrast” and “significantly higher than” as comparison anchors.
Final Tip
Build your vocabulary in layers. Start with the five core trend verbs (rise, fall, fluctuate, plateau, peak) and their noun forms. Add one column of modifiers (strong, moderate, slight). Then memorise five or six comparison phrases (compared to, whereas, in contrast, significantly higher/lower than, both X and Y). Practice writing one paragraph per day using a different combination, and within two weeks this language will feel automatic.
Consistent, deliberate practice with this vocabulary — not just passive reading — is what closes the gap between a Band 6 and a Band 7 in Lexical Resource. Take one chart from an official practice test, write your description, and check that you have used at least three different trend expressions and two comparison phrases before you submit your final answer on test day.