seizing vs grasp

seizing and grasp both are nouns.

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

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

seizing: the act of gripping something firmly with the hands (or the tentacles)
grasp: the act of grasping

Other hyponyms of seizing include clasp, clench, clutch, clutches, grip, hold.

seizing (noun)	grasp (noun)
the act of gripping something firmly with the hands (or the tentacles)	the act of grasping
small stuff that is used for lashing two or more ropes together	an intellectual hold or understanding
	understanding of the nature or meaning or quality or magnitude of something
	the limit of capability

seizing (verb)	grasp (verb)
	get the meaning of something
	hold firmly