Vocabulary is one of the few skills the GL Assessment 11+ tests across two of the three papers, both the English paper and the Verbal Reasoning paper, and synonym (closest-meaning) questions are the most common vocabulary type of all, an estimated 30 to 35% of vocabulary marks. That makes a strong, wide vocabulary one of the highest-yield things a child can build, because it lifts scores on two papers at once. These weightings are our research estimates from analysing GL papers and tutor resources, not figures GL publishes.
This page is about what words mean: finding the closest synonym, the opposite (antonym), the best word to fill a sentence, and the meaning of a word as it is used in a passage. That makes it different from our grammar page, which tests how words fit together correctly, and from our word class page, which tests naming the job a word does. In the English paper, vocabulary appears inside the comprehension section (for example "which word is closest in meaning to X as used in line Y?") and in gap-fill questions; in Verbal Reasoning it appears as closest-meaning, opposite-meaning and double-meaning questions. Every question on PrepStep uses the standard five options (A to E), matching the real exam format.
The reassuring part for parents is that vocabulary grows steadily with the right habits. Wide reading, learning words in families (prefixes, suffixes and roots), and practising the specific GL traps (like picking a word merely associated with the answer rather than its true synonym) turn vocabulary from a worry into a quiet, reliable strength.