computer backup vs duplication

computer backup and duplication both are nouns.

Word	Noun	Adjective	Verb	Adverb
computer backup	Yes	No	No	No
duplication	Yes	No	No	No

As nouns, duplication is a hypernym of computer backup; that is, duplication is a word with a broader meaning than computer backup:

computer backup: (computer science) a copy of a file or directory on a separate storage device
duplication: a copy that corresponds to an original exactly

Other hypernyms of computer backup include duplicate.

computer backup (noun)	duplication (noun)
(computer science) a copy of a file or directory on a separate storage device	the act of copying or making a duplicate (or duplicates) of something
	a copy that corresponds to an original exactly