Synonyms of understudy in English:

understudy


See definition of understudy

noun

1‘he muffed his lines and was often replaced by an understudy’

SYNONYMS
stand-in, substitute, replacement, reserve, fill-in, locum, proxy, backup, relief, standby, supply, surrogate, stopgap, second, alternative, ancillary
locum tenens
informal sub
North American informal pinch-hitter