appurtenance vs fitting

appurtenance and fitting both are nouns.

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

As nouns, fitting is a hyponym of appurtenance; that is, fitting is a word with a more specific, narrower meaning than appurtenance:

Other hyponyms of appurtenance include auto accessory, computer accessory, fixings, trimmings.

appurtenance (noun)	fitting (noun)
a supplementary component that improves capability	putting clothes on to see whether they fit
equipment consisting of miscellaneous articles needed for a particular operation or sport etc.	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

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