vasotomy vs surgical incision

vasotomy and surgical incision both are nouns.

Word	Noun	Adjective	Verb	Adverb
vasotomy	Yes	No	No	No
surgical incision	Yes	No	No	No

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

vasotomy: surgical incision into or division of the vas deferens
surgical incision: the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)

Other hypernyms of vasotomy include incision, section.

vasotomy (noun)	surgical incision (noun)
surgical incision into or division of the vas deferens	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)