Here's what separates a Band 7 from a Band 5: knowing words isn't enough. You need to know which words belong together. That's collocation, and it's worth roughly 25% of your Lexical Resource score. Miss this, and you'll plateau.
Most students memorize vocabulary in isolation. They learn "important" as an adjective and move on. Then they write "very important" when the examiner expects "of paramount importance." They say "do effort" instead of "make an effort." One word wrong, and suddenly you sound like you're translating from another language. These tiny mistakes add up fast.
This post gives you 100 IELTS word combinations that actually appear in essays and speaking tests. More importantly, you'll see the patterns so you can learn them faster and stop guessing.
A collocation is two or more words that naturally go together. "Heavy rain" is a collocation. "Strong coffee" is. "Take a break" is. These combinations work because native speakers have heard them together thousands of times—they're not conscious choices anymore.
The IELTS examiners explicitly reward this. The official band descriptors mention it directly: Band 7 test-takers show "skillful use of less common lexical items" and "appropriate collocation." Band 6 is "adequate collocation," which usually means errors scattered throughout.
Here's what most students miss: you can use perfect grammar and still sound wrong without these word combinations. Compare these two sentences from a real IELTS essay about education.
Weak: "Students must do much work to gain knowledge in the modern world."
Natural: "Students must work hard to acquire knowledge in the modern world."
Both are grammatically correct. But "work hard" and "acquire knowledge" are the actual collocations that native speakers use. The first one reads like a word-for-word translation.
Verbs are where your sentences get power. Pair them with the right nouns, and you sound fluent instantly. Here are the collocations examiners hear constantly in Band 7+ essays.
Notice the pattern? These verbs are specific. "Conduct research" instead of "do research." "Spark debate" instead of "cause discussion." That specificity is what the examiner catches.
Quick tip: When you read a new verb in IELTS material, immediately ask: what noun goes with it? Don't memorize the verb alone. Memorize the pair. This cuts your learning time in half.
Adjectives either strengthen or weaken your argument depending on what noun they're attached to. These 20 combinations appear in almost every high-scoring IELTS writing sample.
These work because the adjectives and nouns have compatible meanings. "Significant" pairs with things you can measure (increase, decline, change). "Persistent" pairs with problems that won't disappear. Once you see the logic, you remember them.
Prepositions trip up more students than anything else. And you can't always guess which one fits. You have to know. Here are 20 preposition collocations that show up constantly in IELTS writing.
Notice how many are full phrases, not single prepositions. That's because prepositions rarely travel alone in academic English. They come bundled. Learn them as chunks, not separate words.
Trick that works: Write these on sticky notes. Put them on your mirror. Say them out loud three times each. Your brain locks in things it hears better than things it only reads.
Let me show you three real IELTS paragraphs. I've only changed the collocations. Everything else stays the same. Watch how much better the writing becomes.
Example 1: Climate Change
Weak (Band 5): "Climate change is a big problem. It will have bad effects on the world. Many people are worried about it. We need to do something fast about this problem. If we don't do anything, bad things will happen to nature and people."
Strong (Band 7): "Climate change poses a profound challenge to humanity. It will bear severe consequences for ecosystems and economies alike. Widespread concern about this issue has sparked considerable debate among policymakers. We must implement comprehensive strategies without delay. Failure to address this threat will yield catastrophic results for future generations."
Example 2: Urban Development
Weak: "Cities are growing. This brings both good things and bad things. On one side, there are more jobs. On the other side, there are traffic and pollution problems. The government must balance these things."
Strong: "Rapid urbanization presents both opportunities and challenges. While cities attract substantial investment and generate employment, they simultaneously face acute problems with congestion and air quality. Policymakers must strike a delicate balance between economic growth and environmental protection to ensure sustainable development."
The strong version uses word pairs that are already "locked" in English. Examiners hear these combinations constantly, which signals that you understand how English actually works.
Reading a list does nothing. You'll forget it by tomorrow. Here's a system that actually works.
Week 1: Pull them from real essays. Download three past IELTS essays (free on the British Council website). Highlight every verb-noun and adjective-noun pair you see. You'll be shocked how many repeat. Write these into a spreadsheet with the example sentence from the essay.
Week 2: Organize by topic. Group your IELTS word combinations by subject: health, environment, education, technology, society. IELTS topics repeat constantly. When you see "discuss advantages and disadvantages of remote work," you instantly know which 15 collocations fit.
Week 3: Retrieval practice. Stop re-reading. That's passive. Instead, cover the collocation, read only the noun, and force yourself to produce the verb or adjective. "Pollution" = what verb? (Reduce, cause, prevent). "Problem" = what adjective? (Persistent, acute, serious). Your brain remembers what it works to retrieve.
Week 4: Write with them. Write one 250-word paragraph using at least five collocations from your list. Submit it for grading. The feedback will show whether you've embedded them naturally or if they feel forced.
Why this works: Don't memorize huge lists. Your brain dumps them within 24 hours. Work with 10-15 collocations at a time, revisit them over weeks. Spaced repetition is the only scientifically proven way to lock vocabulary into long-term memory.
Writing and speaking are different. You can't plan every sentence in speaking. You need collocations so automatic they come out naturally even when you're nervous. These 30 make you sound fluent even when your mind goes blank.
These work in speaking because they're conversational and they buy you thinking time. "As far as I'm concerned" gives you two seconds to organize your next thought. "That said" buys another two seconds. In a two-minute response, those moments add up.
Mistake 1: Translating from your first language. Spanish speakers often write "assist to a class" instead of "attend a class" because that's the literal translation. Chinese speakers write "sit exam" instead of "sit an exam." These errors immediately signal non-native thinking.
Mistake 2: Using collocations that are technically correct but sound wrong. Yes, "profound erudition" is technically a collocation. But it sounds forced in an IELTS essay. Use collocations that appear in actual academic writing, not rare dictionary combinations. The ones in this post are tested.
Mistake 3: Getting the preposition wrong by one letter. "Agree to a plan" vs. "agree with a person." "Responsible for" vs. "responsible to." One letter, but both are critical. When you're unsure, write more simply. "I think" beats "I ascribe to" if you don't know the preposition.
Wrong: "We must take action to the problem."
Right: "We must take action on the problem."
Mistake 4: Overusing the same collocation. If you use "significant increase" in every paragraph, it stops sounding natural. Vary it. Use "marked rise," "steep growth," "sharp uptick." Synonyms are your friend.
You don't need to download everything. Focus on three resources.
Avoid generic 5,000-word vocabulary lists. Your brain will shut down. Focus on 100-150 collocations that IELTS actually tests. That's enough to hit Band 7.
Vocabulary is individual words. You know "significant" means important. Collocations are word pairs that work together in English. You can know "significant" but not know it pairs with "impact" to make "significant impact." Or that in most contexts, you don't say "significant difference"—you say "fundamental difference" or "key difference."
Collocations are about combinations. That's the whole point.
How many collocations do I need to pass the test? You can hit Band 6 with 40-50 accurate collocations. For Band 7, you need 80-100. For Band 8, examiners expect you to use them so naturally they don't even notice. Focus first on accuracy over quantity.
Can I use the same collocation twice in one IELTS essay? You can use it twice, but not three times. Examiners expect variation. If you need "significant" twice, use it once and replace it with "substantial" or "marked" the second time. Repetition signals limited vocabulary.
Should I memorize word-for-word or just understand the idea? Memorize exact collocations for writing and speaking under pressure. You won't have time to think. But during study, understand why the collocation works. Why "take" with "action" and not "do"? Understanding helps retention.
Is it better to use one complex collocation or multiple simple ones? Use what fits naturally. An essay with five simple, accurate collocations (like "take responsibility" and "make progress") scores higher than an essay with one complex collocation used wrongly. Accuracy always beats complexity.
How do I know if I'm using a collocation naturally or forcing it? Read it out loud. If it sounds like you're reciting from a textbook, it's forced. If it sounds like something a native speaker would say, it's natural. When you're unsure, use a simpler word instead.
Environment: Cause pollution, reduce emissions, bear consequences, pose a threat, implement policies, conduct research, yield results, shed light on.
Education: Acquire knowledge, achieve success, fulfill a role, raise awareness, address concerns, conduct research, underlying issues.
Employment: Make a living, take responsibility, hold responsible, mount pressure, generate employment, bear consequences.
Health: Long-term effects, widespread concern, demand attention, conduct research, yield results, compelling evidence.
Technology: Pose a challenge, spark debate, trigger a response, undergo change, inherent risks, implement policies.
If you're working on essays about specific topics, you can also explore environment and climate change vocabulary, education vocabulary for IELTS, or work and employment word lists to specialize your collocation practice for those areas.
This works better than anything else. Pick five collocations from this post. Write a 200-word paragraph using all five naturally. Don't force them. If one doesn't fit, swap it for a different collocation.
Submit it for feedback using our free IELTS essay grading tool. The grader will tell you whether you've used them naturally or if they sound rehearsed. That feedback matters more than reading 100 more examples.
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