fascinate vs grab

fascinate is not a noun while grab is a noun.

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

As verbs, grab is a hyponym of fascinate; that is, grab is a word with a more specific, narrower meaning than fascinate:

Other hyponyms of fascinate include seize.

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

fascinate (verb)	grab (verb)
to render motionless, as with a fixed stare or by arousing terror or awe	capture the attention or imagination of
attract; cause to be enamored	take hold of so as to seize or restrain or stop the motion of
cause to be interested or curious	take or grasp suddenly
	make a grasping or snatching motion with the hand
	get hold of or seize quickly and easily
	obtain illegally or unscrupulously