impression vs incision

impression and incision both are nouns.

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

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

impression (noun)	incision (noun)
an impressionistic portrayal of a person	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)
the act of pressing one thing on or into the surface of another	a depression scratched or carved into a surface
(dentistry) an imprint of the teeth and gums in wax or plaster
an outward appearance
a vague idea in which some confidence is placed
a clear and telling mental image
a symbol that is the result of printing or engraving
all the copies of a work printed at one time
a concavity in a surface produced by pressing