surgical operation vs surgical incision

surgical operation and surgical incision both are nouns.

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

surgical operation (noun)	surgical incision (noun)
a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)