discernment vs grasping

discernment and grasping both are nouns.

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

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

discernment (noun)	grasping (noun)
the trait of judging wisely and objectively	the act of gripping something firmly with the hands (or the tentacles)
the mental ability to understand and discriminate between relations	understanding with difficulty
the cognitive condition of someone who understands
perception of that which is obscure
delicate discrimination (especially of esthetic values)

discernment (adjective)	grasping (adjective)
	immoderately desirous of acquiring e.g. wealth