rancor vs envy

rancor and envy both are nouns.

Word	Noun	Adjective	Verb	Adverb
rancor	Yes	No	No	No
envy	Yes	No	Yes	No

As nouns, envy is a hyponym of rancor; that is, envy is a word with a more specific, narrower meaning than rancor:

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

Other hyponyms of rancor include heartburning, huffishness, sulkiness, grievance, grudge, score, enviousness.

rancor (noun)	envy (noun)
a feeling of deep and bitter anger and ill-will	spite and resentment at seeing the success of another (personified as one of the deadly sins)
	a feeling of grudging admiration and desire to have something that is possessed by another

rancor (verb)	envy (verb)
	be envious of; set one's heart on
	feel envious towards; admire enviously