readjustment vs fitting

readjustment and fitting both are nouns.

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

As nouns, fitting is a hypernym of readjustment; that is, fitting is a word with a broader meaning than readjustment:

Other hypernyms of readjustment include accommodation, adjustment.

readjustment (noun)	fitting (noun)
the act of adjusting again (to changed circumstances)	putting clothes on to see whether they fit
the act of adjusting something to match a standard	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

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