British spelling vs federalise

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

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

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

British spelling (verb)	federalise (verb)
	unite on a federal basis or band together as a league
	put under the control and authority of a federal government
	enter into a league for a common purpose