muscle spasm vs symptom

muscle spasm and symptom both are nouns.

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

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

muscle spasm: a painful and involuntary muscular contraction
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

muscle spasm (noun)	symptom (noun)
a painful and involuntary muscular contraction	anything that accompanies X and is regarded as an indication of X's existence
	(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease