fittingness vs fitting

fittingness and fitting both are nouns.

Word	Noun	Adjective	Verb	Adverb
fittingness	Yes	No	No	No
fitting	Yes	Yes	No	No

fittingness (noun)	fitting (noun)
the quality of being suitable	putting clothes on to see whether they fit
	a small and often standardized accessory to a larger system
	(usually in the plural) furnishings and equipment (especially for a ship or hotel)
	making or becoming suitable; adjusting to circumstances

fittingness (adjective)	fitting (adjective)
	being precisely fitting and right
	in harmony with the spirit of particular persons or occasion