1. (n.) One who, or that which, rings; especially, one who rings chimes on bells.

2. (n.) A crowbar.

3. (n.) A horse that is not entitled to take part in a race, but is fraudulently got into it.

agent alternate alternative analogy backup blagueur bluff bluffer change changeling charlatan comparison copy counterfeit deputy double dummy equal equivalent ersatz exchange fake faker fill-in fourflusher fraud ghost ghostwriter humbug imitation impersonator impostor locum tenens makeshift malingerer metaphor metonymy mountebank next best thing personnel phony picture pinch hitter portrait poser poseur pretender proxy quack quacksalver quackster relief replacement representative reserves saltimbanco second string secondary sham shammer sign simulacrum spares spit spitting image stand-in sub substituent substitute substitution succedaneum superseder supplanter surrogate symbol synecdoche third string token understudy utility player vicar vice-president vice-regent