British spelling vs radio theatre

British spelling and radio theatre both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
radio theatre	Yes	No	No	No

British spelling (noun)	radio theatre (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD.