grab vs harpoon

grab and harpoon both are nouns.

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

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

Other hyponyms of grab include fish, hook, net, nett, intercept, stop.

grab (noun)	harpoon (noun)
the act of catching an object with the hands	a spear with a shaft and barbed point for throwing; used for catching large fish or whales; a strong line is attached to it
a mechanical device for gripping an object

grab (verb)	harpoon (verb)
capture the attention or imagination of	spear with a harpoon
take hold of so as to seize or restrain or stop the motion of
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