List of standby synonyms and standby related words.
Maecenas, abettor, admirer, advocate, aficionado, angel, apologist, backer, bit player, buff, champion, defender, dependence, encourager, endorser, exponent, extra, fan, favorer, figurant, figurante, friend at court, lover, mainstay, maintainer, mute, paranymph, partisan, patron, promoter, protagonist, reliance, second, seconder, sectary, sider, spear-carrier, sponsor, stalwart, stand-in, substitute, supe, super, supernumerary, support, supporter, supporting actor, supporting cast, sustainer, sympathizer, understudy, upholder, votary, walk-on, walking gentleman, well-wisher