TOEIC Link Part 5: commonly confused word pairs master index

Part 5 rewards readers who resolve a blank by meaning, not by matching letters or sound. A large share of its vocabulary questions are built on confusable pairs — two words that look or sound so alike that a hurried reader picks the familiar one instead of the one the sentence actually needs. Studying these one word at a time is slow. It is far more efficient to study them by the pattern that makes them confusable, because the same trap repeats across dozens of pairs.

This page is a hub. It sorts the most-tested pairs into four groups, explains what each group has in common, and links you to a focused lesson for every pair. Work through the group that matches the mistakes you actually make on mock tests.

Group 1: homophones — same sound, different meaning

These pairs sound identical (or nearly so) when spoken, so listening habits do not help you and you must read the surrounding words. Part 5 loves homophones because the wrong answer "sounds right."

• accept versus except — a verb of receiving versus a preposition of exclusion.
• affect versus effect — usually a verb versus usually a noun, the single most common Part 5 pair.
• principal versus principle — a head person or main amount versus a rule or belief.
• complement versus compliment — something that completes versus something of praise.
• stationary versus stationery — not moving versus paper goods.
• capital versus capitol — money or a leading city versus a legislative building.
• council versus counsel — a governing body versus advice.
• cite, site, and sight — to quote versus a location versus vision.

Study move: for every homophone, ask which part of speech the blank needs. Half of these pairs split by grammar (verb versus noun), and grammar resolves them before meaning even matters.

Group 2: one-letter differences — read every character

These pairs differ by a single letter, so the eye slides over the difference. The meanings are usually unrelated, which means the sentence context points sharply to one answer once you slow down.

• elicit versus illicit — to draw out versus illegal.
• adverse versus averse — unfavorable conditions versus personal reluctance.
• eminent versus imminent — distinguished versus about to happen.
• discreet versus discrete — careful about privacy versus separate and distinct.
• loose versus lose — not tight versus to misplace or fail to win.
• than versus then — comparison versus sequence in time.
• personal versus personnel — private versus the staff of an organization.

Study move: cover the ending of the word and predict which letter belongs from the meaning of the sentence. If you cannot, the pair is one to drill.

Group 3: shared-root pairs — one meaning, two forms

These words come from the same root but have drifted into different grammatical roles or shades of meaning. The trap is subtle because both forms often fit the topic; only one fits the exact slot.

• assure, ensure, and insure — reassure a person versus guarantee a result versus cover against loss.
• economic versus economical — relating to the economy versus money-saving.
• continual versus continuous — repeated with breaks versus unbroken.
• comprise, compose, and consist — the whole includes the parts versus the parts make the whole.
• deprecate versus depreciate — to disapprove versus to fall in value.
• device versus devise — a noun for a tool versus a verb for planning.
• raise versus rise — transitive (takes an object) versus intransitive.

Study move: learn the test that separates each pair — an object versus no object, a person versus a result, a form versus a function — not just the definitions.

Group 4: quantifiers and comparison words

A smaller but reliable cluster tests whether you match a quantifier or comparison word to the kind of noun or logic in the sentence.

• fewer versus less — countable items versus uncountable mass.
• farther versus further — physical distance versus figurative extent.
• later versus latter — after in time versus the second of two.
• disinterested versus uninterested — impartial versus bored.
• imply versus infer — the speaker suggests versus the listener concludes.

Study move: decide first whether the noun in the sentence is countable, then whether the sentence is about distance, time, or logic. The grammar of the noun usually settles the answer.

How to use this hub efficiently

1. Take a mock Part 5 and mark every vocabulary miss.
2. Sort your misses into the four groups above. Most learners cluster in one or two groups — homophones and one-letter differences are the usual culprits.
3. Drill that group first using the linked lessons, then re-test after a week.
4. Rotate. Once a group drops below one miss per section, move to the next.

Confusable pairs are one of the highest-return areas in Part 5 because the same handful of traps — sound-alike, one letter off, shared root, wrong quantifier — repeat endlessly with new vocabulary. Learn the pattern and you resolve pairs you have never seen before. For an overview of how the Part 5 word-choice section fits into the wider test, start with what is TOEIC Link.