talking picture vs picture show

talking picture and picture show both are nouns.

Word	Noun	Adjective	Verb	Adverb
talking picture	Yes	No	No	No
picture show	Yes	No	No	No

As nouns, picture show is a hypernym of talking picture; that is, picture show is a word with a broader meaning than talking picture:

talking picture: a movie with synchronized speech and singing
picture show: a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement

talking picture (noun)	picture show (noun)
a movie with synchronized speech and singing	a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement