belligerency vs hostility

belligerency and hostility both are nouns.

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

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

Other hypernyms of belligerency include enmity, ill will.

belligerency (noun)	hostility (noun)
fighting; acts of overt warfare	violent action that is hostile and usually unprovoked
hostile or warlike attitude or nature	a hostile (very unfriendly) disposition
	the feeling of a hostile person
	a state of deep-seated ill-will