muscle spasm vs cramp

muscle spasm and cramp both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscle spasm	Yes	No	No	No
cramp	Yes	No	Yes	No

As nouns, muscle spasm and cramp are synonyms defined as:

Other synonyms of muscle spasm include spasm.

muscle spasm (noun)	cramp (noun)
a painful and involuntary muscular contraction	a strip of metal with ends bent at right angles; used to hold masonry together
	a clamp for holding pieces of wood together while they are glued
	a painful and involuntary muscular contraction

muscle spasm (verb)	cramp (verb)
	suffer from sudden painful contraction of a muscle
	affect with or as if with a cramp
	prevent the progress or free movement of
	secure with a cramp