gibbosity vs protuberance

gibbosity and protuberance both are nouns.

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

As nouns, gibbosity and protuberance are synonyms defined as:

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

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

gibbosity (noun)	protuberance (noun)
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