Synonyms and Antonyms: Free KS2 Years 5 to 6 English Worksheet

What is on the worksheet

The worksheet centres on six familiar words — big, happy, fast, quiet, strong and kind. For each word your child writes one synonym (a word that means roughly the same) and one antonym (a word that means the opposite). A word bank offers eight more ambitious words to start from. A short tick activity then asks them to decide, for six word pairs, whether the two words are synonyms or antonyms, which checks that they can use the two terms accurately rather than simply guessing. A cheerful child jumping for joy sits alongside the tasks, ready to be coloured in as a reward for finishing.

Synonyms and antonyms explained

A synonym is a word that has a similar meaning to another word, such as happy and cheerful, or fast and rapid. An antonym is a word with the opposite meaning, such as happy and miserable, or fast and slow. A useful memory aid is that 'synonym' and 'similar' both begin with an 's', while 'antonym' shares its 'ant-' beginning with words like 'anti-', meaning against. It is worth explaining that most synonyms are not exactly the same: big, large, huge and enormous all share a meaning but carry slightly different strengths, which is precisely why a wider vocabulary helps a writer say exactly what they mean.

How to use it at home or in the classroom

Read each word aloud together and talk about its meaning before writing anything. Encourage your child to think of more than one possibility — there is rarely a single right answer — and then to choose the one they like best. A thesaurus (in print or online) is a natural partner for this sheet and helps children discover ambitious alternatives such as delighted, ecstatic or content for happy. For the tick activity, ask your child to read each pair aloud and decide whether the words point in the same direction or in opposite directions. To extend the task, choose one of the new synonyms and use it in a sentence together, so the richer word is practised in real writing.

What your child will learn

Working with synonyms and antonyms strengthens vocabulary, deepens understanding of shades of meaning, and gives children the tools to make deliberate word choices in their own writing. It also supports reading comprehension, because recognising that two words are related by meaning helps with understanding unfamiliar texts and with answering vocabulary questions in the Key Stage 2 reading test. By the end of the sheet, the aim is that your child can confidently define what synonyms and antonyms are and can generate examples of each for everyday words.

A note for teachers

This sheet supports the Year 6 objective in English Appendix 2 on how words are related by meaning as synonyms and antonyms; ‘synonym’ and ‘antonym’ are Year 6 terminology for pupils. It works well as a starter, an independent task, or a take-home activity, and pairs naturally with thesaurus work and with up-levelling sentences. Because answers are open, it also offers a quick window into each child's working vocabulary: a pupil who can only offer 'not big' for an antonym of big may benefit from explicit teaching of words such as tiny, minute and microscopic. The answer notes give acceptable examples rather than a single correct response.

Frequently asked questions