synchronisation vs readjustment

synchronisation and readjustment both are nouns.

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

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

synchronisation: an adjustment that causes something to occur or recur in unison
readjustment: the act of adjusting something to match a standard

Other hypernyms of synchronisation include adjustment, registration.

synchronisation (noun)	readjustment (noun)
coordinating by causing to indicate the same time	the act of adjusting again (to changed circumstances)
an adjustment that causes something to occur or recur in unison	the act of adjusting something to match a standard
the relation that exists when things occur at the same time