enviousness vs bitterness

enviousness and bitterness both are nouns.

Word	Noun	Adjective	Verb	Adverb
enviousness	Yes	No	No	No
bitterness	Yes	No	No	No

As nouns, bitterness is a hypernym of enviousness; that is, bitterness is a word with a broader meaning than enviousness:

enviousness: a feeling of grudging admiration and desire to have something that is possessed by another
bitterness: a feeling of deep and bitter anger and ill-will

Other hypernyms of enviousness include gall, rancor, rancour, resentment.

enviousness (noun)	bitterness (noun)
a feeling of grudging admiration and desire to have something that is possessed by another	the property of having a harsh unpleasant taste
	a rough and bitter manner
	the taste experience when quinine or coffee is taken into the mouth
	a feeling of deep and bitter anger and ill-will