myotomy vs surgical procedure

myotomy and surgical procedure both are nouns.

Word	Noun	Adjective	Verb	Adverb
myotomy	Yes	No	No	No
surgical procedure	Yes	No	No	No

As nouns, surgical procedure is a hypernym of myotomy; that is, surgical procedure is a word with a broader meaning than myotomy:

myotomy: surgical incision or division of a muscle
surgical procedure: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

Other hypernyms of myotomy include operation, surgery, surgical operation, surgical process.

myotomy (noun)	surgical procedure (noun)
surgical incision or division of a muscle	a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body