third string

88 Moby Thesaurus words for "third string":
      agent, alternate, alternative, analogy, back seat, backup, cast,
      change, changeling, company, comparison, complement, copy,
      counterfeit, crew, deputy, double, dummy, eight, eleven, equal,
      equivalent, ersatz, exchange, fake, fill-in, first string,
      first team, five, ghost, ghostwriter, humbleness, humility,
      imitation, inferiority, juniority, locum tenens, lowliness,
      makeshift, metaphor, metonymy, minority, next best thing, nine,
      personnel, phony, pinch hitter, platoon, proxy, relief,
      replacement, representative, reserves, ringer, rowing crew,
      second fiddle, second string, second team, secondariness,
      secondary, servility, sign, spares, squad, stand-in, string, sub,
      subjection, subordinacy, subordination, subservience, substituent,
      substitute, substitution, succedaneum, superseder, supplanter,
      surrogate, symbol, synecdoche, team, token, understudy,
      utility player, varsity, vicar, vice-president, vice-regent