gastromy vs surgical incision

gastromy and surgical incision both are nouns.

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

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

gastromy: surgical incision into the stomach
surgical incision: the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)

Other hypernyms of gastromy include incision, section.

gastromy (noun)	surgical incision (noun)
surgical incision into the stomach	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)