valvotomy vs valvulotomy

valvotomy and valvulotomy both are nouns.

Word	Noun	Adjective	Verb	Adverb
valvotomy	Yes	No	No	No
valvulotomy	Yes	No	No	No

As nouns, valvotomy and valvulotomy are synonyms defined as:

valvotomy and valvulotomy: incision into a stenosed cardiac valve to relieve the obstruction

valvotomy (noun)	valvulotomy (noun)
incision into a stenosed cardiac valve to relieve the obstruction	incision into a stenosed cardiac valve to relieve the obstruction