spasm vs constriction

spasm and constriction both are nouns.

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

As nouns, constriction is a hypernym of spasm; that is, constriction is a word with a broader meaning than spasm:

spasm: (pathology) sudden constriction of a hollow organ (as a blood vessel)
constriction: the action or process of compressing

spasm (noun)	constriction (noun)
(pathology) sudden constriction of a hollow organ (as a blood vessel)	the action or process of compressing
a painful and involuntary muscular contraction	a tight feeling in some part of the body
	tight or narrow compression
	a narrowing that reduces the flow through a channel