Vocabulary That Lifts a Band, and Vocabulary That Sinks One
Advanced words used incorrectly do not score high. What lifts this criterion is the precise ordinary word, and there are more of those than you think.
What the criterion actually rewards
Vocabulary is 20 per cent of the writing score and it is scored on four things: range, accurate word choice, absence of repetition, correct expressions and collocations, and fit with the topic and the tone. Notice what is not on that list. Difficulty is not on it. Length of word is not on it. Latinate origin is not on it.
The criterion also states the negative case directly: advanced vocabulary used incorrectly must not score high. So a response that reaches for ameliorate and lands on I hope you can ameliorate my complaint scores worse than the same response with resolve, because the ambitious version is both wrong and visible.
That combination means the criterion behaves less like a vocabulary test and more like a precision test. The question being asked of each word is not is this impressive but is this exactly the thing you mean, in a shape English actually uses, at the right distance from the reader.
Precision beats rarity: worked substitutions
The reliable way to lift Vocabulary is to replace a general word with the specific word for what happened. Each pair below is a real upgrade, and in every case the better version is the plainer one.
The cabinet was damaged becomes the glass door of the cabinet cracked across its full width. Damaged is a category; cracked is the event.
Water is coming from the ceiling becomes water has been dripping steadily from the kitchen ceiling. The verb now carries the rate and the manner.
Please do something about it becomes could you arrange for a plumber to inspect both units. The request now names an action, an agent and a scope.
The situation is very bad for me becomes I have stopped using the stove and I empty buckets twice a day. The abstraction is replaced by two observable facts, which lifts Content and Coherence at the same time.
The library is good for the community becomes the library is open to anyone who walks in, not only to registered members. Good has been replaced by the actual property that makes it good.
Notice that none of the improved versions uses a rarer word. They use a more exact one, and they are often the same length.
Collocation: the errors that show most
A collocation is the partner a word normally takes. Getting one wrong is the clearest possible signal of a learner sentence, because native usage is arbitrary and cannot be reasoned out.
Do a decision should be make a decision. Do a mistake should be make a mistake. Make homework should be do homework. Say me the answer should be tell me the answer.
The business-formula errors are worth naming separately because they recur in formal emails. Do the needful is not standard Canadian English. Revert back to me should be reply to me or get back to me. Kindly as a substitute for please reads as a very particular regional register and is safer avoided. I am in receipt of your mail should be I received your email.
For complaints specifically: you file or submit a complaint, you lodge one in formal usage, but you do not put or give one. A company issues a refund, offers compensation and arranges an inspection.
The practical defence is simple. When you are unsure of the partner, restructure the sentence so the word is not needed. I would like to make a complaint about can become I am writing about, and the risk disappears at no cost.
Range without repetition
Range in a 180-word response means not using the same content word four times. It does not mean using four different words for the same thing, which produces its own problem.
Take a complaint email about a move. The word problem can easily appear five times. The fix is not to find five synonyms for problem but to name each thing precisely: the cracked door, the missing box, the unanswered calls, the delay. Now the repetition is gone and the specificity has gone up.
The same applies to the verbs in a Task 2 response. Candidates reach for help repeatedly: it helps students, it helps the town, it helps families. Replace each with what it actually does: it gives students somewhere to work, it saves the town the cost of a new building, it keeps families in the neighbourhood on winter evenings.
Where genuine synonyms are useful is in the frame words rather than the content words. Option B, the library proposal, extending the hours and this choice can all refer to the same thing across four paragraphs, and that variation reads as control rather than as a thesaurus.
When you cannot find the word in under ten seconds, write the plain one and move on. A twenty-second hunt costs development time on a 30 per cent criterion to chase a 20 per cent one, and rushed substitutions are where wrong words come from.
Tone fit: the same idea in two registers
Vocabulary is scored as appropriate to the topic and tone, so a word can be correct and still wrong. Compare the same request written for two readers.
To a landlord: I would appreciate it if you could arrange for the repair to be carried out this week. To a friend: Any chance you could get it fixed this week? Both are good vocabulary. Swapping them makes both bad.
The formal register wants arrange, confirm, regarding, I would appreciate, at your earliest convenience used sparingly, and full forms rather than contractions. The informal register wants sort out, let me know, about, any chance, soon, and contractions throughout.
The failure mode that costs most is formal vocabulary in an informal email, because it is the one that feels safe. I would be grateful if you could apprise me of your availability sent to a cousin is not a high-level sentence, it is a register error dressed as one, and it damages both Vocabulary and Task Fulfilment.
Building usable vocabulary before the test
General word lists are close to useless for this section, because CELPIP Writing prompts cluster in a small number of situations: complaints about goods and services, requests to a landlord or employer, invitations and news to friends, and civic choices about how to spend money or time.
So build by situation, not alphabetically. For complaints, collect the verbs that describe damage and remedy: crack, dent, scratch, leak, seize, replace, reimburse, inspect, compensate. For civic topics, collect the nouns that let you be specific about who benefits: residents, ratepayers, commuters, newcomers, seniors, registered members, drop-in users.
Then test each new word by writing one full sentence with it in a real prompt context. A word you cannot put in a correct sentence today is a word that will be used incorrectly under time pressure, and the criterion penalises exactly that.
Finally, keep a short list of collocations you have got wrong and re-read it before each practice attempt. Collocation errors are habitual rather than random, which means the same three or four will recur until you see them written down.
Replace every use of "problem", "situation", "issue" and "thing" with the specific noun for what you mean. This single pass usually fixes repetition and vagueness at the same time.
Practise it
Five substitutions to judge. In each one, decide which version the criterion actually rewards.