gibbousness vs protrusion

gibbousness and protrusion both are nouns.

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

As nouns, gibbousness and protrusion are synonyms defined as:

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

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

gibbousness (noun)	protrusion (noun)
something that bulges out or is protuberant or projects from its surroundings	the act of projecting out from something
	something that bulges out or is protuberant or projects from its surroundings