Synonyms are different words with almost identical or similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn (σύν) ("with") and onoma (ὄνομα) ("name"). The words car and automobile are synonyms. Similarly, if we talk about a long time or an extended time, long and extended become synonyms. In the figurative sense, two words are often said to be synonymous if they have the same connotation: Synonyms can be any part of speech (e.g. nouns, verbs, adjectives, adverbs or prepositions), as long as both members of the pair are the same part of speech. Note that synonyms are defined with respect to certain senses of words; for instance, pupil as the "aperture in the iris of the eye" is not synonymous with student. Similarly, he expired means the same as he died, yet my passport has expired cannot be replaced by my passport has died.
Synonyms and antonyms are another important aspect of word building that you can easily include in your lessons at any level. Even beginners learn antonyms when they study adjectives like tall, short, big, and small at which point they will also probably learn that small and little are similar. There are 80 worksheets available in this section now with more being added all the time by busy teachers like you. Here is an example. This is a challenging word game created for intermediate students that encourages them to work in groups, have fun, and use synonyms. The directions are included on the last page of the document and, if there are particular words that you would like students to practice, it couldn't be simpler to edit the cards. This popular worksheet is one of many so if it is not appropriate for your students, consider one of the other worksheets instead. Remember that all our worksheets are free so you should visit again the next time you need a worksheet.