British spelling vs favoured

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

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

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

British spelling (adjective)	favoured (adjective)
	preferred above all others and treated with partiality