backup Synonyms

substitute stand-in backing standby reserve reliever accompaniment extra relief backup man fill-in championship spare support patronage 2nd tailback soundtrack supplemental suppletive supporting second-stringer reserve fund helping hand vicarious cc surrogation egis amicus curiae energiser understudy vicarial musical accompaniment surrogate backrest fallback supportive potentiation read out rearguard relief pitcher second string sideshow spare part sunnah unreplaceable reinforcements spares reinforcer sinking fund