cupidity vs greed

cupidity and greed both are nouns.

Word	Noun	Adjective	Verb	Adverb
cupidity	Yes	No	No	No
greed	Yes	No	No	No

As nouns, greed is a hypernym of cupidity; that is, greed is a word with a broader meaning than cupidity:

cupidity: extreme greed for material wealth
greed: excessive desire to acquire or possess more (especially more material wealth) than one needs or deserves

cupidity (noun)	greed (noun)
extreme greed for material wealth	reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins)
	excessive desire to acquire or possess more (especially more material wealth) than one needs or deserves