photo mural vs wallpaper

photo mural and wallpaper both are nouns.

Word	Noun	Adjective	Verb	Adverb
photo mural	Yes	No	No	No
wallpaper	Yes	No	Yes	No

As nouns, wallpaper is a hypernym of photo mural; that is, wallpaper is a word with a broader meaning than photo mural:

photo mural: A decorative printed wallpaper usually placed on only one wall; the print can either be custom or chosen from a predefined set.
wallpaper: a decorative paper for the walls of rooms

photo mural (noun)	wallpaper (noun)
A decorative printed wallpaper usually placed on only one wall; the print can either be custom or chosen from a predefined set.	a decorative paper for the walls of rooms

photo mural (verb)	wallpaper (verb)
	cover with wallpaper