phlebotomy vs venesection

phlebotomy and venesection both are nouns.

Word	Noun	Adjective	Verb	Adverb
phlebotomy	Yes	No	No	No
venesection	Yes	No	No	No

As nouns, phlebotomy and venesection are synonyms defined as:

phlebotomy and venesection: surgical incision into a vein; used to treat hemochromatosis

phlebotomy (noun)	venesection (noun)
surgical incision into a vein; used to treat hemochromatosis	surgical incision into a vein; used to treat hemochromatosis