IELTS Idiom & Vocab Master / Guides
Band 6 to Band 7: What Actually Changes in Your Vocabulary
The move from 6 to 7 is the hardest half-band in IELTS because the criteria change in kind, not just degree. This guide translates the Lexical Resource descriptors into concrete study targets.
What the descriptors say, in plain language
For Lexical Resource, Band 6 requires a vocabulary wide enough to discuss topics at length and some ability to paraphrase, even with mistakes. Band 7 adds three new demands:
- Less common vocabulary — words beyond the everyday core.
- Idiomatic language — some natural idioms and fixed expressions (Speaking especially).
- Awareness of style and collocation — knowing which words combine and which register fits, with only occasional wrong choices.
Notice what is not demanded: perfection. Band 7 explicitly tolerates some inappropriate choices. The bar is flexibility and naturalness most of the time, not error-free rare words.
The three gaps, and how to close each
Gap 1: everything you say is high-frequency
Band 6 candidates typically operate inside the 2,000 most common English words. The fix is not memorizing obscure words — it is upgrading the words you already overuse. Replace good/bad/big/get with precise alternatives in your own recorded answers, then re-record. Precision, not rarity, is what "less common" means in practice.
Gap 2: zero idiomatic language
Many Band 6 speakers use no idioms at all, because school English never taught conversational ones. Two or three natural idioms across a Speaking test is enough to satisfy the descriptor. Build a personal set of 15–20 current idioms tagged by topic, and rehearse them aloud inside your own sentences. See our idioms guide for a starter set.
Gap 3: collocation errors
"Do a mistake," "take a decision about," "strong rain" — each is understandable, and each caps you at Band 6 because the combination is wrong. Collocations cannot be derived from rules; they have to be learned as pairs inside sentences. Prioritize verb+noun pairs, where most errors happen.
A four-week plan
- Week 1 — audit. Record two Speaking Part 2 answers and write one Task 2 essay. Highlight every repeated basic word and every combination you are unsure of. This list is your syllabus.
- Week 2 — collocations. Learn 5 verb+noun collocations daily inside sentences; quiz yourself on the previous days' items each session.
- Week 3 — idioms. Add 3 topic-tagged idioms daily, rehearsed aloud. Keep quizzing week 2 material.
- Week 4 — integration. Re-record the same Part 2 answers and rewrite the same essay. Compare against week 1: the upgrade should be audible and visible.
Reality check: vocabulary is one of four criteria. If your Fluency or Grammar is at Band 5.5, fixing Lexical Resource alone will not produce an overall 7. But Lexical Resource is usually the fastest criterion to move, because it responds directly to focused study.
Practice this in IELTS Idiom & Vocab Master
The app's categories map one-to-one onto the Band 7 requirements: idioms for Speaking, six collocation types for Writing, and academic vocabulary for register — with analytics showing which category is your weak one.