stay vs stop

stay and stop both are nouns.

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

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

Other hyponyms of stay include sojourn, visit, layover, stopover.

As nouns, stay and stop are synonyms defined as:

Other synonyms of stay include arrest, check, halt, hitch, stoppage.

As verbs, stop is a hypernym of stay; that is, stop is a word with a broader meaning than stay:

Other hypernyms of stay include block, halt, kibosh.

stay (noun)	stop (noun)
continuing or remaining in a place or state	the act of stopping something
(nautical) brace consisting of a heavy rope or wire cable used as a support for a mast or spar	a brief stay in the course of a journey
a thin strip of metal or bone that is used to stiffen a garment (e.g. a corset)	a restraint that checks the motion of something
a judicial order forbidding some action until an event occurs or the order is lifted	an obstruction in a pipe or tube
the state of inactivity following an interruption	a mechanical device in a camera that controls size of aperture of the lens
	(music) a knob on an organ that is pulled to change the sound quality from the organ pipes
	a consonant produced by stopping the flow of air at some point and suddenly releasing it
	a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
	the event of something ending
	a spot where something halts or pauses
	the state of inactivity following an interruption

stay (verb)	stop (verb)
stay the same; remain in a certain state	prevent completion
stop or halt	stop and wait, as if awaiting further instructions or developments
overcome or allay	hold back, as of a danger or an enemy; check the expansion or influence of
fasten with stays	seize on its way
be in a certain place and not leave	render unsuitable for passage
stop a judicial process	come to a halt, stop moving
dwell	cause to end
continue in a place, position, or situation	interrupt a trip
hang on during a trial of endurance	stop from happening or developing
	put an end to a state or an activity
	have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical