The phrase "of a kind" refers to something that is unique or unlike anything else. There are several synonyms that can be used to convey a similar meaning, such as "one-of-a-kind", "unique", "distinctive", "singular", "uncommon", "exceptional", "extraordinary", "rare", "special", "unusual", or "unmatched". These words can be used to describe a person, object, or situation that stands out from the rest and possesses a quality that cannot be replicated. Synonyms for "of a kind" can help to add variety and depth to your writing and convey a more precise meaning.