gibbousness vs gibbosity

gibbousness and gibbosity both are nouns.

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

As nouns, gibbousness and gibbosity are synonyms defined as:

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

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

gibbousness (noun)	gibbosity (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