Strong vocabulary for IELTS Task 2 does not mean using rare or obscure words — it means natural, precise language that registers the topic correctly. The lexical resource criterion rewards vocabulary that is varied (no repetition), precise (the best word for your exact meaning), and natural-sounding. Using complicated terminology when a simpler word communicates meaning better is actually penalised.

Targeted vocabulary replacement produces faster results than general vocabulary expansion. Most Band 6 candidates already know words like "detrimental" and "beneficial" but default to "bad" and "good" under exam pressure. The solution is deliberate practice: identify the five or six words that appear most in your practice essays and prepare three specific alternatives for each. After four to six weeks of practice, the alternatives become automatic.

The five most repeated words in IELTS Task 2 essays are: "people", "government", "important", "negative", and "increase". Examiners notice word repetition immediately — particularly within a single paragraph. The solution is not just knowing synonyms but training yourself to use them automatically under time pressure through repeated practice essays.

Functional phrase banks are more valuable than topic word lists because they transfer across any essay topic. "The primary advantage of this trend is that…" works equally well for technology, education or environment essays. A well-developed phrase bank means your ability to structure arguments, signal your position and introduce examples is at full strength on test day regardless of which topic appears.

IELTS academic vocabulary is not about using rare terms — it is about writing formal English rather than spoken or conversational English. The register should resemble a well-crafted newspaper opinion piece or a formal report: clear, concise, and impersonal when appropriate. Nominalisation is one of the most powerful single techniques for raising the academic level of any IELTS essay.

Lexical resource is not about the quantity of vocabulary but the quality of its use. Band 6 has enough vocabulary to communicate but shows considerable repetition, imprecise word choices and noticeable spelling errors. The shift from Band 6 to Band 7 is about precision and collocation accuracy — not just adding more paraphrased words.

Collocation accuracy is one of the most reliable indicators of lexical competence in IELTS. Native speakers and advanced writers use "make a decision" not "do a decision", "take responsibility" not "make responsibility" without thinking. Examiners notice collocation errors immediately even when surrounding vocabulary is appropriate. Learning collocations as fixed phrases — rather than replacing individual words — is the most efficient path to improving your lexical resource score.

Opinion phrases serve two purposes in IELTS Task 2: they demonstrate your position clearly (task response) and they contribute to vocabulary range (lexical resource). Repeatedly using only "I think" signals poor lexical range. Rotating between "From my point of view", "In my opinion" and "I believe that" shows the vocabulary variety that Band 7 rewards.

The Band 6 to Band 7 vocabulary gap is primarily a precision and collocation gap — not a knowledge gap. Most Band 6 candidates can recall words like "detrimental" and "considerable" but under exam pressure default to simpler choices. The solution is deliberate practice: write five practice essays specifically targeting these substitutions until the precise alternatives flow as naturally as the simple words.

Formal register in IELTS Task 2 covers vocabulary, sentence structure and even punctuation. Examiners identify informal register signals immediately: contractions, phrasal verbs used in formal contexts ("come up with" → "develop"), vague nouns ("things", "stuff", "a lot") and casual connectors ("So…", "Anyway…"). Replacing the most common informal words with their formal equivalents is one of the quickest, most demonstrable vocabulary improvements a candidate can make.