readjustment vs adjustment

readjustment and adjustment both are nouns.

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

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

Other hypernyms of readjustment include accommodation, fitting.

As nouns, readjustment and adjustment are synonyms defined as:

readjustment and adjustment: the act of adjusting something to match a standard

Other synonyms of readjustment include registration.

readjustment (noun)	adjustment (noun)
the act of adjusting again (to changed circumstances)	the act of making something different (as e.g. the size of a garment)
the act of adjusting something to match a standard	the act of adjusting something to match a standard
	making or becoming suitable; adjusting to circumstances
	an amount added or deducted on the basis of qualifying circumstances
	the process of adapting to something (such as environmental conditions)