grasping vs greedy

grasping is a noun but greedy is not a noun.

Word	Noun	Adjective	Verb	Adverb
grasping	Yes	Yes	No	No
greedy	No	Yes	No	No

As adjectives, grasping and greedy are synonyms defined as:

Other synonyms of grasping include avaricious, covetous, grabby, prehensile.

grasping (noun)	greedy (noun)
the act of gripping something firmly with the hands (or the tentacles)
understanding with difficulty

grasping (adjective)	greedy (adjective)
immoderately desirous of acquiring e.g. wealth	immoderately desirous of acquiring e.g. wealth
	(often followed by `for') ardently or excessively desirous
	wanting to eat or drink more than one can reasonably consume