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noun
Someone who takes the place of another (as when things get dangerous or difficult).
synonyms: backup, fill-in, relief, reliever, stand-in, substitute.
is a specific kind of: compeer, equal, match, peer.
is a broader term that covers: locum, locum tenens | double, stunt man, stunt woman | alternate, replacement, surrogate.
derivation: fill in, stand in, sub, substitute | deputise, deputize, step in, substitute | relieve, take over | alternate, alternative, substitute.
Dutch: vervanger
Find more on backup man elsewhere: etymology - rhymes - Wikipedia.
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