British spelling vs familiarisation

British spelling and familiarisation both are nouns.

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

British spelling (noun)	familiarisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the experience of becoming familiar with something