concurrent execution vs multiprogramming

concurrent execution and multiprogramming both are nouns.

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

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

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

concurrent execution (noun)	multiprogramming (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