multiprogramming vs concurrent execution

multiprogramming and concurrent execution both are nouns.

Word	Noun	Adjective	Verb	Adverb
multiprogramming	Yes	No	No	No
concurrent execution	Yes	No	No	No

As nouns, multiprogramming and concurrent execution are synonyms defined as:

multiprogramming and concurrent execution: the execution of two or more computer programs by a single computer

multiprogramming (noun)	concurrent execution (noun)
the execution of two or more computer programs by a single computer	the execution of two or more computer programs by a single computer