protrusion vs protuberance

protrusion and protuberance both are nouns.

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

As nouns, protrusion and protuberance are synonyms defined as:

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

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

protrusion (noun)	protuberance (noun)
the act of projecting out from something	something that bulges out or is protuberant or projects from its surroundings
something that bulges out or is protuberant or projects from its surroundings	the condition of being protuberant; the condition of bulging out