tear vs tear apart

tear is a noun but tear apart is not a noun.

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

tear (noun)	tear apart (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 (verb)	tear apart (verb)
separate or cause to separate abruptly	express a totally negative opinion of
to separate or be separated by force
strip of feathers
move quickly and violently
fill with tears or shed tears