IELTS Academic Task 1 Table Vocabulary for Comparisons

An IELTS Academic Task 1 table may contain dozens of numbers. Your job is not to narrate every cell. IELTS officially asks you to describe visual information in your own words, include the most important points, give a well-organised overview, and organise, present, and possibly compare data.

This lesson teaches five expressions for table decisions:

In the current IELTS Academic Writing format, Task 1 may present one or more graphs, charts, or tables. You should spend about 20 minutes and write at least 150 words in connected text. All required information is in the visual, so do not invent causes or outside facts.

For more practice, visit the IELTS vocabulary hub and Exam English hub.

A sample table for this lesson

The figures below are invented solely for language practice. They show daily trips, in thousands, made by four modes in two cities.

Before writing, identify:

• row categories: car, bus, rail, bicycle;
• column groups: Northport and Southbay;
• unit: thousands of trips per day;
• largest patterns: cars lead in Northport; cars and buses are close in Southbay;
• smallest pattern: cycling is lowest in both, but Southbay's figure is more than double Northport's;
• near match: rail differs by only 5,000 trips.

That analysis gives you an overview and two useful detail groups. It prevents a cell-by-cell list.

1. Account for: state a share only when a total exists

Account for + amount or percentage can mean form a stated part of a total.

"Car journeys accounted for 48 per cent of all trips in Northport."

The total is 1,000,000 trips and the car figure is 480,000, so the share is supported. Natural patterns include accounted for the largest share, accounted for nearly half of, and together accounted for X per cent.

The phrase also has another sense: explain a result or difference. Several factors may account for the gap. Do not use that causal sense in Task 1 unless the visual itself supplies explanatory information. A table showing a gap does not reveal why it exists.

Do not confuse account for with take into account, which means consider. And do not calculate percentages unless the totals and arithmetic are clear; raw-value comparisons may be safer.

2. Constitute: put the part in the subject position

Constitute can say that a part or set of parts forms a share or whole.

"Bus and rail journeys constituted half of all trips in Southbay."

The combined figure is 495,000 out of 900,000, so strictly it is 55 per cent rather than half. A precise version is:

"Bus and rail journeys constituted 55 per cent of Southbay's total."

The correction demonstrates why vocabulary cannot rescue inaccurate data.

The subject is the part and the object is the share or whole: Cycling constituted the smallest category. Do not reverse the direction: The total constituted cars, buses, rail, and bicycles is not the taught pattern. With the whole as subject, use comprised or consisted of.

Constitute is formal and neutral. Saying that car trips constitute 48 per cent does not mean that the share is excessive, desirable, or caused by policy.

3. Substantial: use size evidence, not emphasis

Substantial means large in amount, degree, or extent.

"There was a substantial gap of 180,000 car trips between Northport and Southbay."

Useful combinations include a substantial difference, a substantial proportion, a substantial increase, and substantially higher than. The figure or pattern should justify the adjective.

The word does not add a cause or judgment. A substantial car figure is not automatically a transport problem. A substantial difference does not show which city performed better unless the measure has an explicitly positive or negative meaning.

Also distinguish a static difference from a change. The sample table compares two cities at one time, so Northport's car total was substantially higher is accurate. Car use increased substantially in Northport invents an earlier value and is not supported.

4. Marginal: very small, but not necessarily irrelevant

Marginal or marginally describes a very small amount, difference, effect, or change.

"Northport's rail figure was marginally higher than Southbay's, at 210,000 versus 205,000 trips."

The comparison supplies both values. Natural patterns include a marginal difference, a marginal increase, marginally lower than, and the gap was marginal.

The word states size but not direction: a marginal rise goes up; a marginal decline goes down. It also does not say the difference is unimportant. A small gap may matter in some contexts, but Task 1 normally reports rather than evaluates consequences.

Avoid slightly marginal. Both words express smallness. Choose one and provide the figures where useful.

5. Negligible: make the contextual “too small to matter” judgment carefully

Negligible describes an amount, effect, risk, cost, or difference so small that it is not worth considering in the analysis at hand.

"The five-thousand-trip difference between the two rail figures was negligible relative to their totals of just over 200,000."

The relative comparison supports the judgment. There is no universal numerical threshold: a difference of five may be negligible among millions but decisive in a table whose values range from zero to ten.

This is stronger than marginal. Marginal reports that a difference is very small. Negligible additionally judges that it is too small to matter for the present analysis. When unsure, state the exact values or use slight/marginal rather than making the extra judgment.

Do not confuse negligible with negligent, which means careless.

Select an overview before writing detail

An overview should report the dominant patterns without becoming a number list. For the sample table:

"Overall, cars were the most common mode in Northport, whereas cars and buses recorded similar totals in Southbay. Cycling was the least used mode in both cities, although its Southbay figure was more than twice that of Northport."

This overview identifies leadership, clustering, and the smallest category. It does not explain why the cities differ because the table provides no causes.

Then group details by a meaningful relationship rather than row order:

• High-use road modes: compare cars and buses across both cities.
• Rail and cycling: report the negligible rail gap and strong cycling contrast.

A worked Task 1 response

"The table compares the number of daily journeys made by four transport modes in Northport and Southbay, measured in thousands. Overall, cars accounted for the largest share in Northport, while car and bus use was relatively similar in Southbay. Cycling constituted the smallest category in both cities, despite being considerably more common in Southbay.

Northport recorded 480,000 car journeys, a substantial 180,000 more than Southbay. The pattern was reversed for buses: Southbay's figure stood at 290,000, compared with 260,000 in Northport. Together, cars and buses accounted for 74 per cent of Northport's million daily trips and approximately two thirds of Southbay's total.

Rail use was almost identical, with Northport only marginally ahead at 210,000 versus 205,000. This difference was negligible relative to the size of the two rail totals. By contrast, Southbay recorded 105,000 bicycle journeys, more than double Northport's 50,000."

The response states the unit, gives a clear overview, groups related details, and supports degree words with figures. It never narrates a cause that the table does not show.

Common table-vocabulary mistakes

• Narrating every cell: select dominant patterns and group comparisons.
• Omitting the unit: distinguish people, trips, dollars, percentages, and thousands.
• Inventing movement: static columns do not show an increase or decline.
• Inventing causes: a table reports what differs, not necessarily why.
• Reversing constitute: parts constitute a share or whole.
• Using account for without a total: confirm the denominator before stating a share.
• Treating marginal and negligible as identical: the latter adds an importance judgment.
• Mixing percentage and percentage points: a rise from 20% to 30% is 10 percentage points, or 50 per cent relative to the original 20%.

Quick check

1. A category forms 30 out of a total of 100. It:

A. accounts for 30 per cent B. takes into account 30 per cent C. explains the cause of 30 per cent

2. Which direction is accurate?

A. "Two categories constitute 60 per cent of the total." B. "The total constitutes of two categories." C. "The whole constitutes its listed parts."

3. A difference is very small, but the table gives no reason to dismiss it. The safer word is:

A. marginal B. negligible by definition C. substantial

4. Two static city columns differ by 100. Which wording avoids invented change?

A. "City A's figure was substantially higher than City B's." B. "City A's figure increased substantially." C. "The difference caused a rise."

Answers: 1-A, 2-A, 3-A, 4-A. Account for can state a share. Parts constitute a share or whole. Marginal reports small size without dismissing it. Static data support comparison, not change.

Controlled practice

Create a four-row table with two locations and a stated unit. Then write:

1. one overview sentence containing no more than one figure;
2. one correct account for share with an explicit total;
3. one constitute sentence with the part as subject;
4. one substantial comparison supported by values;
5. one marginal comparison; and
6. a negligible judgment only if the context genuinely supports “too small to matter.”

Finally, circle every causal verb. Unless the table supplies causes, remove them.

If you want to practise retrieving precise vocabulary for Task 1 comparisons, try Lyra Practice.

Sources

• IELTS Academic Writing test format — IELTS
• IELTS Writing test preparation resources — IELTS
• IELTS Academic sample test questions — IELTS
• IELTS Writing band descriptors — IELTS

Related

• IELTS Vocabulary Practice
• Exam English Vocabulary Practice
• IELTS Writing Task 1 Vocabulary for Charts and Graphs
• IELTS Task 1 Maps Vocabulary
• IELTS Task 1 Process Vocabulary

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