challenge vs stop

challenge and stop both are nouns.

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

challenge (noun)	stop (noun)
a call to engage in a contest or fight	the act of stopping something
questioning a statement and demanding an explanation	a brief stay in the course of a journey
a formal objection to the selection of a particular person as a juror	a restraint that checks the motion of something
a demand by a sentry for a password or identification	an obstruction in a pipe or tube
a demanding or stimulating situation	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

challenge (verb)	stop (verb)
issue a challenge to	prevent completion
take exception to	stop and wait, as if awaiting further instructions or developments
raise a formal objection in a court of law	hold back, as of a danger or an enemy; check the expansion or influence of
ask for identification	seize on its way
	render unsuitable for passage
	come to a halt, stop moving
	cause to end
	interrupt a trip
	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