phlebotomy vs surgical incision

phlebotomy and surgical incision both are nouns.

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

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

phlebotomy: surgical incision into a vein; used to treat hemochromatosis
surgical incision: the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)

Other hypernyms of phlebotomy include incision, section, bloodletting.

phlebotomy (noun)	surgical incision (noun)
surgical incision into a vein; used to treat hemochromatosis	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation)