combat vs combatant

combat and combatant both are nouns.

Word	Noun	Adjective	Verb	Adverb
combat	Yes	No	Yes	No
combatant	Yes	Yes	No	No

combat (noun)	combatant (noun)
an engagement fought between two military forces	someone who fights (or is fighting)
the act of fighting; any contest or struggle

combat (adjective)	combatant (adjective)
	engaging in or ready for combat

combat (verb)	combatant (verb)
battle or contend against in or as if in a battle