* Synonym: This is the most common and general term for a word with the same or similar meaning.
* Equivalent: Similar to synonym, but emphasizes that the words have the same meaning in a specific context.
* Paraphrase: This refers to rephrasing a word or phrase using different words.
* Substitution: A more general term for replacing one word with another.
* Alternative: This implies that the word is a different choice, but not necessarily with the same meaning.
* Variant: This refers to a different form of a word, often with a slight change in meaning or pronunciation.
The best word to use will depend on the specific situation and the relationship between the words you're discussing.