drop vs tear

drop and tear both are nouns.

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

As nouns, tear is a hyponym of drop; that is, tear is a word with a more specific, narrower meaning than drop:

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

Other hyponyms of drop include teardrop, raindrop, droplet, eye-drop, eyedrop.

drop (noun)	tear (noun)
the act of dropping something	a drop of the clear salty saline solution secreted by the lacrimal glands
a central depository where things can be left or picked up	the act of tearing
a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery	an occasion for excessive eating or drinking
a sudden sharp decrease in some quantity	an opening made forcibly as by pulling apart
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

drop (verb)	tear (verb)
give birth; used for animals	separate or cause to separate abruptly
grow progressively worse	to separate or be separated by force
go down in value	strip of feathers
stop pursuing or acting	move quickly and violently
change from one level to another	fill with tears or shed tears
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