Absolute (strict) synonyms refer to two words which are identical in meaning in all its aspects. They are interchangeable in all contexts. Strict synonyms are very rare, and some linguists even argue that strict synonyms do not exist. Strict synonymy is uneconomical; it creates unnecessary redundancy in a language. When two words are in danger of becoming strict synonyms, one of them would either change its meaning, or fade away from the language and become an archaic word.