stop vs challenge

stop and challenge both are nouns.

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

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

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