British spelling vs acclimatisation

British spelling and acclimatisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
acclimatisation	Yes	No	No	No

British spelling (noun)	acclimatisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	adaptation to a new climate (a new temperature or altitude or environment)