belligerency vs combat

belligerency and combat both are nouns.

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

As nouns, combat is a hypernym of belligerency; that is, combat is a word with a broader meaning than belligerency:

Other hypernyms of belligerency include armed combat.

belligerency (noun)	combat (noun)
fighting; acts of overt warfare	an engagement fought between two military forces
hostile or warlike attitude or nature	the act of fighting; any contest or struggle

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