fitting vs try-on

fitting and try-on both are nouns.

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

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

Other synonyms of fitting include trying on.

fitting (noun)	try-on (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

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