synonym

/ˈsɪnəˌnɪm/

two words that can be interchanged in a context are said to be synonymous relative to that context

Chinese meaning: 同义词

'Happy' and 'joyful' are synonyms that can be used interchangeably.

“Happy”和“joyful”是可以互换使用的同义词。

Using synonyms enriches your vocabulary and avoids repetition.

使用同义词可以丰富词汇量并避免重复。