understudyEnglishOxford English Thesaurusunderstudy noun he muffed his lines and was often replaced by an understudy: stand-in, substitute, replacement, reserve, fill-in, locum, proxy, backup, relief, standby, supply, surrogate, stopgap, second, alternative, ancillary; Latin locum tenens; informal sub; North American, informal pinch-hitter.understudy Oxford Dictionary of English
EnglishOxford English Thesaurus
