prevailing party vs litigant

prevailing party and litigant both are nouns.

Word	Noun	Adjective	Verb	Adverb
prevailing party	Yes	No	No	No
litigant	Yes	No	No	No

As nouns, litigant is a hypernym of prevailing party; that is, litigant is a word with a broader meaning than prevailing party:

prevailing party: the party in a lawsuit who obtains a judgment in their own favor
litigant: (law) a party to a lawsuit; someone involved in litigation

Other hypernyms of prevailing party include litigator.

prevailing party (noun)	litigant (noun)
the party in a lawsuit who obtains a judgment in their own favor	(law) a party to a lawsuit; someone involved in litigation