Passenger numbers climbed steadily from 2.1 million to 3.4 million over the first six years, before surging to 5.8 million in 2017, when a second line opened. After a slight dip in 2018, the figure recovered and grew to 6.2 million by the end of the period, almost three times the 2010 level.
Written by Fizza Butool Zaidi and Ali Zaidi
12 alternatives
Other words for “increase”
1.rise
verbWriting and SpeakingThe neutral partner of increase and the safest swap. It never takes an object.
Rice exports rose from 2 million to 3.5 million tonnes between 2010 and 2020.
Don't swap blindly: Rise has no object. 'The government rose taxes' is wrong; a person or organisation raises something.
2.grow
verbWriting and SpeakingNatural with populations, economies, cities, markets and membership; less natural with prices.
The urban population grew steadily throughout the period.
3.climb
verbWritingA steady, often gradual rise, usually towards a high level.
Average monthly rents climbed steadily, reaching £950 by 2020.
4.go up
phrasal verbSpeakingNeutral and common in speech. In a report, use it once at most; single-word verbs read as more formal.
Bus fares have gone up every year since I started college.
5.surge
verbWritingA sudden, large rise over a short time.
Online grocery orders surged in 2020, almost doubling in twelve months.
6.soar
verbWritingRise very quickly to a high level. Strong, so keep it for the most dramatic change on the chart.
Bicycle sales soared from 20,000 to 95,000 in just three years.
Don't swap blindly: Do not use it for a modest rise; it overstates the data, and accurate description is part of the Task Achievement score.
7.jump
verbWriting and SpeakingA sudden rise in one step between two neighbouring points.
The share of remote workers jumped from 12% to 30% between 2019 and 2020.
8.double / triple
verbWriting and SpeakingExact multiples. Precise, so examiners see that you have read the figures.
The number of museum visitors doubled, from 4,000 to 8,000.
Don't swap blindly: Only if the figure really doubled. A move from 4,000 to 7,500 'almost doubled'.
9.expand
verbWritingGrowth in size, area or scope: a network, a market, a city, a company.
The tram network expanded from 30 to 48 kilometres over the decade.
Don't swap blindly: Not for prices, rates or percentages. 'Prices expanded' is wrong.
10.escalate
verbWritingRise in a way that is unwelcome: costs, tension, conflict.
Repair costs escalated after 2015 as the bridge aged.
Don't swap blindly: It carries a negative judgement. Do not use it for neutral data such as student enrolments.
11.recover / pick up
verbWriting and SpeakingA rise that follows a fall, back towards an earlier level. Pick up is less formal.
Hotel bookings dipped in 2012 but recovered the following year.
Don't swap blindly: Only after a previous fall; otherwise it misdescribes the chart.
12.skyrocket / rocket
verbSpeakingVery fast, dramatic rise. Journalistic and informal.
House prices in my city have skyrocketed since the metro opened.
Don't swap blindly: Avoid it in Academic Task 1; choose soar or surge for the same idea in a formal register.
Paraphrasing
How to paraphrase “increase” well
- Change the structure, not only the verb: 'Sales increased sharply' can become 'There was a sharp increase in sales' or 'Sales saw a sharp increase'. Three patterns give you variety without risky words.
- Let the adverb carry the detail. 'Rose sharply', 'rose gradually' and 'rose slightly' describe the data more precisely than hunting for a rarer verb.
- Repeating 'increase' twice in a report is fine. Using 'soar' for a 2% change is not: accuracy comes before variety.
Band tip: the public IELTS Writing band descriptors for Lexical Resource describe Band 7 as using “less common lexical items” with “some awareness of style and collocation”. A synonym that changes your meaning or breaks a collocation works against you, so choose the word that fits the sentence, not the rarest one you know.
In context
Use it in an answer
Frequently asked questions
What is the best synonym for increase in IELTS Writing Task 1?+
Rise is the safest because it means the same and fits almost any noun. For more detail, pair rise or increase with an adverb (sharply, gradually, slightly), or use surge for a sudden large rise and climb for a steady one.
Can I use skyrocket in IELTS Writing?+
Not in Academic Task 1. It is journalistic and informal. Soar or surge express a dramatic rise in a register that suits a report. In Speaking, skyrocket is fine.
What is the difference between rise and raise?+
Rise has no object: prices rise. Raise needs one: the council raised prices. Charts usually show things rising on their own, so rise is the verb you need in most Task 1 reports.
How many times can I use increase in one report?+
There is no fixed limit. Two or three uses spread across a report, mixed with the noun form and one or two alternatives, read naturally. What lowers a score is a misused synonym, not a repeated accurate word.
Practise
See real answers to paraphrase
© 2026 BandLadder. Written and checked by the BandLadder team. You may quote or cite this page with credit to BandLadder and a link to it; republishing it in full needs our written permission. Content use policy