blepharospasm vs cramp

blepharospasm and cramp both are nouns.

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

As nouns, cramp is a hypernym of blepharospasm; that is, cramp is a word with a broader meaning than blepharospasm:

Other hypernyms of blepharospasm include muscle spasm, spasm.

blepharospasm (noun)	cramp (noun)
spasm of the eyelid muscle resulting in closure of the eye	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

blepharospasm (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