sizeable vs British spelling

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

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

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

sizeable (adjective)	British spelling (adjective)
large in amount or extent or degree
fairly large in size