IELTS vocabulary isn't a secret list, it's the CEFR B2 to C2 range, reframed around what examiners expect at each band.
For candidates targeting IELTS band 6.5+. B2 covers band 5–6, C1 covers band 7, C2 covers band 8–9.
IELTS vocabulary isn't a secret list, it's the CEFR B2 to C2 range, reframed around what examiners expect at each band. From band 6 upward, the test rewards range and precision: not just having a word, but choosing the right one and collocating it naturally. The same topics recur across Writing and Speaking, education, environment, technology, urbanisation, health, so the vocabulary that pays off clusters around those themes. Higher bands ask for less common items and idiomatic control, while lower bands are scored on whether the basic word does the job at all.
Most candidates sit IELTS for university admission, skilled migration, or professional registration, where a specific overall band and a minimum in each section are non-negotiable. A band 6.5 to 7 is the common admission threshold for undergraduate and many postgraduate programmes; band 7.5+ is expected by competitive courses and some licensing bodies. Your current band tells you which CEFR slice to work on: 6 is solid B2, 7 to 8 is C1, and 9 is C2. Identify your weakest of the four skills, because IELTS reports a per-skill score, not just an average.
Treat vocabulary as topic-and-collocation work rather than isolated word lists: learn renewable energy, carbon emissions, and government subsidies as units you can deploy under time pressure. Drill the words you half-know with spaced repetition, prioritising the lexical resource band descriptors, less common items, paraphrase, and natural collocation, since that is exactly what raises a 6 to a 7. Read The Guardian, The Economist, and academic abstracts for the register IELTS rewards, and note how arguments are signposted. Write practice essays under timed conditions and check whether you actually used the higher-band words you have been reviewing, or fell back on safe ones.