constriction vs spasm

constriction and spasm both are nouns.

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

As nouns, spasm is a hyponym of constriction; that is, spasm is a word with a more specific, narrower meaning than constriction:

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

Other hyponyms of constriction include squeeze, strangulation, vasoconstriction.

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