comprehend vs grasp

comprehend is not a noun while grasp is a noun.

Word	Noun	Adjective	Verb	Adverb
comprehend	No	No	Yes	No
grasp	Yes	No	Yes	No

As verbs, comprehend and grasp are synonyms defined as:

Other synonyms of comprehend include apprehend, compass, dig, get the picture, grok, savvy.

comprehend (noun)	grasp (noun)
	the act of grasping
	an intellectual hold or understanding
	understanding of the nature or meaning or quality or magnitude of something
	the limit of capability

comprehend (verb)	grasp (verb)
get the meaning of something	get the meaning of something
to become aware of through the senses	hold firmly
include in scope; include as part of something broader; have as one's sphere or territory