tear vs drop

tear and drop both are nouns.

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

As nouns, drop is a hypernym of tear; that is, drop is a word with a broader meaning than tear:

tear: a drop of the clear salty saline solution secreted by the lacrimal glands
drop: a small indefinite quantity (especially of a liquid)

Other hypernyms of tear include drib, driblet.

tear (noun)	drop (noun)
a drop of the clear salty saline solution secreted by the lacrimal glands	the act of dropping something
the act of tearing	a central depository where things can be left or picked up
an occasion for excessive eating or drinking	a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery
an opening made forcibly as by pulling apart	a sudden sharp decrease in some quantity
	a free and rapid descent by the force of gravity
	a predetermined hiding place for the deposit and distribution of illicit goods (such as drugs or stolen property)
	a steep high face of rock
	a small indefinite quantity (especially of a liquid)
	a shape that is spherical and small

tear (verb)	drop (verb)
separate or cause to separate abruptly	give birth; used for animals
to separate or be separated by force	grow progressively worse
strip of feathers	go down in value
move quickly and violently	stop pursuing or acting
fill with tears or shed tears	change from one level to another
	lower the pitch of (musical notes)
	fall or sink into a state of exhaustion or death
	leave undone or leave out
	omit (a letter or syllable) in speaking or writing
	utter with seeming casualness
	lose (a game)
	take (a drug, especially LSD), by mouth
	remove (cargo, people, etc.) from and leave
	to remove
	cause to fall by or as if by delivering a blow
	let or cause to fall in drops
	to fall vertically
	let fall to the ground
	fall or descend to a lower place or level
	pay out
	stop associating with
	terminate an association with
	hang loosely