Synonyms of understudy in English:

understudy


See US English definition of understudy

See UK English definition of understudy

See Spanish definition of suplente

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