incision vs slit

incision and slit both are nouns.

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

As nouns, incision and slit are synonyms defined as:

Other synonyms of incision include dent, prick, scratch.

incision (noun)	slit (noun)
the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)	a long narrow opening
a depression scratched or carved into a surface	obscene terms for female genitals
	a narrow fissure
	a depression scratched or carved into a surface

incision (verb)	slit (verb)
	cut a slit into
	make a clean cut through