screen background vs desktop

screen background and desktop both are nouns.

Word	Noun	Adjective	Verb	Adverb
screen background	Yes	No	No	No
desktop	Yes	No	No	No

As nouns, screen background and desktop are synonyms defined as:

screen background and desktop: (computer science) the area of the screen in graphical user interfaces against which icons and windows appear

Other synonyms of screen background include background.

screen background (noun)	desktop (noun)
(computer science) the area of the screen in graphical user interfaces against which icons and windows appear	(computer science) the area of the screen in graphical user interfaces against which icons and windows appear
	the top of a desk