belligerency vs armed combat

belligerency and armed combat both are nouns.

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

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

Other hypernyms of belligerency include combat.

belligerency (noun)	armed combat (noun)
fighting; acts of overt warfare	an engagement fought between two military forces
hostile or warlike attitude or nature