THESAURUS
second string
agent, alternate, alternative, analogy, back seat, backup, cast, change, changeling, common, company, comparison, complement, copy, counterfeit, crew, demeaning, deputy, disadvantaged, double, dummy, eight, eleven, equal, equivalent, ersatz, exchange, fake, fill-in, first string, first team, five, ghost, ghostwriter, humble, humbleness, humility, imitation, in the shade, inferior, inferiority, infra dig, junior, juniority, less, lesser, locum tenens, low, lower, lowliness, lowly, makeshift, metaphor, metonymy, minor, minority, modest, next best thing, nine, ordinary, personnel, phony, pinch hitter, platoon, proxy, relief, replacement, representative, reserves, ringer, rowing crew, second fiddle, second rank, second team, secondariness, secondary, servile, servility, sign, spares, squad, stand-in, string, sub, subaltern, subject, subjection, subordinacy, subordinate, subordination, subservience, subservient, substituent, substitute, substitution, succedaneum, superseder, supplanter, surrogate, symbol, synecdoche, team, third rank, third string, token, underprivileged, understudy, utility player, varsity, vicar, vice-president, vice-regent, vulgar