backgrounding vs background processing

backgrounding and background processing both are nouns.

Word	Noun	Adjective	Verb	Adverb
backgrounding	Yes	No	No	No
background processing	Yes	No	No	No

As nouns, backgrounding and background processing are synonyms defined as:

backgrounding and background processing: the execution of low priority programs while higher priority programs are not using the processing system

backgrounding (noun)	background processing (noun)
the execution of low priority programs while higher priority programs are not using the processing system	the execution of low priority programs while higher priority programs are not using the processing system