stop vs drop

stop and drop both are nouns.

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

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

stop (noun)	drop (noun)
the act of stopping something	the act of dropping something
a brief stay in the course of a journey	a central depository where things can be left or picked up
a restraint that checks the motion of something	a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery
an obstruction in a pipe or tube	a sudden sharp decrease in some quantity
a mechanical device in a camera that controls size of aperture of the lens	a free and rapid descent by the force of gravity
(music) a knob on an organ that is pulled to change the sound quality from the organ pipes	a predetermined hiding place for the deposit and distribution of illicit goods (such as drugs or stolen property)
a consonant produced by stopping the flow of air at some point and suddenly releasing it	a steep high face of rock
a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations	a small indefinite quantity (especially of a liquid)
the event of something ending	a shape that is spherical and small
a spot where something halts or pauses
the state of inactivity following an interruption

stop (verb)	drop (verb)
prevent completion	give birth; used for animals
stop and wait, as if awaiting further instructions or developments	grow progressively worse
hold back, as of a danger or an enemy; check the expansion or influence of	go down in value
seize on its way	stop pursuing or acting
render unsuitable for passage	change from one level to another
come to a halt, stop moving	lower the pitch of (musical notes)
cause to end	fall or sink into a state of exhaustion or death
interrupt a trip	leave undone or leave out
stop from happening or developing	omit (a letter or syllable) in speaking or writing
put an end to a state or an activity	utter with seeming casualness
have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical	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