British spelling vs polymerisation

British spelling and polymerisation both are nouns.

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

British spelling (noun)	polymerisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	a chemical process that combines several monomers to form a polymer or polymeric compound