grab vs seize

grab is a noun but seize is not a noun.

Word	Noun	Adjective	Verb	Adverb
grab	Yes	No	Yes	No
seize	No	No	Yes	No

As verbs, grab and seize are synonyms defined as:

As verbs, seize is a hypernym of grab; that is, seize is a word with a broader meaning than grab:

Other hypernyms of grab include clutch, prehend, take hold, take hold of.

As verbs, seize is a hypernym of grab; that is, seize is a word with a broader meaning than grab:

Other hypernyms of grab include clutch, prehend, take hold, take hold of.

grab (noun)	seize (noun)
the act of catching an object with the hands
a mechanical device for gripping an object

grab (verb)	seize (verb)
capture the attention or imagination of	capture the attention or imagination of
take hold of so as to seize or restrain or stop the motion of	affect
take or grasp suddenly	take into your hands deliberately
make a grasping or snatching motion with the hand	take or capture by force
get hold of or seize quickly and easily	hook by a pull on the line
obtain illegally or unscrupulously	take possession of by force, as after an invasion
	take temporary possession of as a security, by legal authority
	seize and take control without authority and possibly with force; take as one's right or possession