class feeling vs hostility

class feeling and hostility both are nouns.

Word	Noun	Adjective	Verb	Adverb
class feeling	Yes	No	No	No
hostility	Yes	No	No	No

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

class feeling: feelings of envy and resentment of one social or economic class for toward another
hostility: the feeling of a hostile person

Other hypernyms of class feeling include enmity, ill will.

class feeling (noun)	hostility (noun)
feelings of envy and resentment of one social or economic class for toward another	violent action that is hostile and usually unprovoked
	a hostile (very unfriendly) disposition
	the feeling of a hostile person
	a state of deep-seated ill-will