break up vs stop

break up is not a noun while stop is a noun.

Word	Noun	Adjective	Verb	Adverb
break up	No	No	Yes	No
stop	Yes	No	Yes	No

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

break up: close at the end of a session
stop: have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical

Other hypernyms of break up include cease, end, finish, terminate.

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

Other hypernyms of break up include break, break off, discontinue.

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

break up (noun)	stop (noun)
	the act of stopping something
	a brief stay in the course of a journey
	a restraint that checks the motion of something
	an obstruction in a pipe or tube
	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

break up (verb)	stop (verb)
laugh unrestrainedly	prevent completion
break or cause to break into pieces	stop and wait, as if awaiting further instructions or developments
come to an end	hold back, as of a danger or an enemy; check the expansion or influence of
separate (substances) into constituent elements or parts	seize on its way
cause to go into a solution	render unsuitable for passage
cause to separate	come to a halt, stop moving
close at the end of a session	cause to end
bring the association of to an end or cause to break up	interrupt a trip
make a break in	stop from happening or developing
set or keep apart	put an end to a state or an activity
break violently or noisily; smash	have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical
attack with or as if with a pickaxe of ice or rocky ground, for example
release ice
destroy the completeness of a set of related items
take apart into its constituent pieces
suffer a nervous breakdown
disband
to cause to separate and go in different directions
discontinue an association or relation; go different ways