acclimatisation vs acclimation

acclimatisation and acclimation both are nouns.

Word	Noun	Adjective	Verb	Adverb
acclimatisation	Yes	No	No	No
acclimation	Yes	No	No	No

As nouns, acclimatisation and acclimation are synonyms defined as:

acclimatisation and acclimation: adaptation to a new climate (a new temperature or altitude or environment)

Other synonyms of acclimatisation include acclimatization.

acclimatisation (noun)	acclimation (noun)
adaptation to a new climate (a new temperature or altitude or environment)	adaptation to a new climate (a new temperature or altitude or environment)