radio theatre vs radio drama

radio theatre and radio drama both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio theatre	Yes	No	No	No
radio drama	Yes	No	No	No

As nouns, radio theatre and radio drama are synonyms defined as:

radio theatre and radio drama: a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD.

Other synonyms of radio theatre include audio drama, radio theater.

radio theatre (noun)	radio drama (noun)
a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD.	a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD.