spasm vs cramp

spasm and cramp both are nouns.

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

As nouns, spasm and cramp are synonyms defined as:

Other synonyms of spasm include muscle spasm.

spasm (noun)	cramp (noun)
(pathology) sudden constriction of a hollow organ (as a blood vessel)	a strip of metal with ends bent at right angles; used to hold masonry together
a painful and involuntary muscular contraction	a clamp for holding pieces of wood together while they are glued
	a painful and involuntary muscular contraction

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