As nouns the difference between must and stop
is that
must is something that is mandatory or required or
must can be the property of being stale or musty or
must can be a time during which male elephants exhibit increased levels of sexual activity and aggressiveness
(also musth) while
stop is .
As a verb must
is to do with certainty; (
indicates that the speaker is certain that the subject will have executed the predicate) or
must can be to make musty.