protrusion vs gibbousness

protrusion and gibbousness both are nouns.

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

As nouns, protrusion and gibbousness are synonyms defined as:

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

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

protrusion (noun)	gibbousness (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