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Click any word in a definition or example to find the entry for that word

About our free online thesaurus

Free Online Thesaurus

The Macmillan Dictionary includes a thesaurus – but it's a thesaurus with a difference.

Most online thesauruses were developed independently from the dictionary they're linked to. Consequently, you often get long, unsystematic lists of synonyms for a word you have looked up. It can be hard to know which one to choose, especially when many of them relate to a different meaning of the word you are interested in.

Our free online thesaurus is fully integrated with the dictionary, so you always get a carefully-selected list of words related exactly to the particular meaning you are looking for.

Free Online Thesaurus

Every word, phrase, and individual meaning in the Macmillan Dictionary has a corresponding thesaurus entry, introduced by the symbol Free Online Thesaurus.

Some words (such as happy or stroll) have thesaurus entries giving synonyms for that word. Others (such as tennis, apartment, or palm tree) generate related terms, showing you all the words for sports, types of housing, or species of tree.

To make the thesaurus entries even easier to use:

  • a short definition is included underneath each synonym or related word
  • you can click on any word in the list to see the full dictionary definition

The term thesaurus comes from an Ancient Greek word meaning 'treasure trove' or 'storehouse'. The Macmillan Dictionary free online English thesaurus is exactly that! More than just a list of synonyms, it places each word in context, draws distinctions between similar words and helps you choose just the word you need.

Macmillan learn live love play