ostracise vs British spelling

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

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

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

ostracise (verb)	British spelling (verb)
avoid speaking to or dealing with
expel from a community or group