Synonyms and related words :
advocate, agent, alter ego, alternate, alternative, amicus curiae, analogy, assistant, attorney, backup, backup man, bit player, champion, change, changeling, comparison, copy, counterfeit, deputy, double, dummy, equal, equivalent, ersatz, exchange, executive officer, exponent, extra, fake, figurant, figurante, figurehead, fill-in, ghost, ghostwriter, imitation, lieutenant, locum, locum tenens, makeshift, metaphor, metonymy, mute, next best thing, paranymph, personnel, phony, pinch hitter, pleader, procurator, proxy, relief, replacement, representative, reserves, ringer, second, second in command, second string, secondary, sign, spares, spear-carrier, standby, sub, substituent, substitute, substitution, succedaneum, supe, super, supernumerary, superseder, supplanter, support, supporting actor, supporting cast, surrogate, symbol, synecdoche, third string, token, understudy, utility man, utility player, vicar, vicar general, vice, vice-president, vice-regent, vicegerent, walk-on, walking gentleman