specialise vs British spelling

specialise is not a noun while British spelling is a noun.

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

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

specialise (verb)	British spelling (verb)
become more focused on an area of activity or field of study
suit to a special purpose
evolve so as to lead to a new species or develop in a way most suited to the environment
be specific about
devote oneself to a special area of work