British spelling vs overgeneralise

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

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

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

British spelling (verb)	overgeneralise (verb)
	draw too general a conclusion