British spelling vs isomerise

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

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

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

British spelling (verb)	isomerise (verb)
	change into an isomer
	cause to change into an isomer