tear up vs tear

tear up is not a noun while tear is a noun.

Word	Noun	Adjective	Verb	Adverb
tear up	No	No	Yes	No
tear	Yes	No	Yes	No

As verbs, tear is a hypernym of tear up; that is, tear is a word with a broader meaning than tear up:

Other hypernyms of tear up include bust, rupture, snap.

tear up (noun)	tear (noun)
	a drop of the clear salty saline solution secreted by the lacrimal glands
	the act of tearing
	an occasion for excessive eating or drinking
	an opening made forcibly as by pulling apart

tear up (verb)	tear (verb)
tear into shreds	separate or cause to separate abruptly
	to separate or be separated by force
	strip of feathers
	move quickly and violently
	fill with tears or shed tears