protuberance vs excrescence

protuberance and excrescence both are nouns.

Word	Noun	Adjective	Verb	Adverb
protuberance	Yes	No	No	No
excrescence	Yes	No	No	No

As nouns, protuberance and excrescence are synonyms defined as:

protuberance and excrescence: something that bulges out or is protuberant or projects from its surroundings

Other synonyms of protuberance include bulge, bump, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, swelling.

protuberance (noun)	excrescence (noun)
something that bulges out or is protuberant or projects from its surroundings	(pathology) an abnormal outgrowth or enlargement of some part of the body
the condition of being protuberant; the condition of bulging out	something that bulges out or is protuberant or projects from its surroundings