incision vs laparotomy

incision and laparotomy both are nouns.

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

As nouns, laparotomy is a hyponym of incision; that is, laparotomy is a word with a more specific, narrower meaning than incision:

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

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