British spelling vs acetylise

British spelling is a noun but acetylise is not a noun.

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

British spelling (noun)	acetylise (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

British spelling (verb)	acetylise (verb)
	receive substitution of an acetyl group
	introduce an acetyl group into (a chemical compound)