rancor vs enviousness

rancor and enviousness both are nouns.

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

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

rancor: a feeling of deep and bitter anger and ill-will
enviousness: 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, envy.

rancor (noun)	enviousness (noun)
a feeling of deep and bitter anger and ill-will	a feeling of grudging admiration and desire to have something that is possessed by another