defender vs belligerent

defender and belligerent both are nouns.

Word	Noun	Adjective	Verb	Adverb
defender	Yes	No	No	No
belligerent	Yes	Yes	No	No

As nouns, belligerent is a hypernym of defender; that is, belligerent is a word with a broader meaning than defender:

Other hypernyms of defender include battler, combatant, fighter, scrapper.

defender (noun)	belligerent (noun)
a person who cares for persons or property	someone who fights (or is fighting)
a fighter who holds out against attack

defender (adjective)	belligerent (adjective)
	characteristic of an enemy or one eager to fight
	engaged in war