try-on vs fitting

try-on and fitting both are nouns.

Word	Noun	Adjective	Verb	Adverb
try-on	Yes	No	No	No
fitting	Yes	Yes	No	No

As nouns, try-on and fitting are synonyms defined as:

Other synonyms of try-on include trying on.

try-on (noun)	fitting (noun)
putting clothes on to see whether they fit	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

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