backup vs substitute

substitute vs backup

backup and substitute both are nouns.

backup is not an adjective while substitute is an adjective.

backup is not a verb while substitute is a verb.

Word	Noun	Adjective	Verb	Adverb
backup	Yes	No	No	No
substitute	Yes	Yes	Yes	No

As nouns, backup and substitute are synonyms defined as:

backup and substitute: someone who takes the place of another (as when things get dangerous or difficult)

Other synonyms of backup include backup man, fill-in, relief, reliever, stand-in.

backup (noun)	substitute (noun)
the act of providing approval and support	a person or thing that takes or can take the place of another
(computer science) a copy of a file or directory on a separate storage device	someone who takes the place of another (as when things get dangerous or difficult)
a musical part (vocal or instrumental) that supports or provides background for other musical parts	an athlete who plays only when a starter on the team is replaced
someone who takes the place of another (as when things get dangerous or difficult)
an accumulation caused by clogging or a stoppage

backup (adjective)	substitute (adjective)
	artificial and inferior
	serving or used in place of another
	capable of substituting in any of several positions on a team

backup (verb)	substitute (verb)
	put in the place of another; switch seemingly equivalent items
	be a substitute
	act as a substitute

Difference between backup and substitute

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