laparotomy vs surgical incision

laparotomy and surgical incision both are nouns.

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

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

laparotomy: surgical incision into the abdominal wall; often done to examine abdominal organs
surgical incision: the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)

Other hypernyms of laparotomy include incision, section.

laparotomy (noun)	surgical incision (noun)
surgical incision into the abdominal wall; often done to examine abdominal organs	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)