rapacious vs rapacity

rapacious is not a noun while rapacity is a noun.

Word	Noun	Adjective	Verb	Adverb
rapacious	No	Yes	No	No
rapacity	Yes	No	No	No

rapacious (noun)	rapacity (noun)
	reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins)
	extreme gluttony
	(of an animal, usually a bird) The quality of subsisting off live prey.

rapacious (adjective)	rapacity (adjective)
excessively greedy and grasping
living by preying on other animals especially by catching living prey
devouring or craving food in great quantities