backbiter

• POS: Noun
• HYPHEN: back=bit=er

CIDE DICTIONARY

backbiter, n. 

 One who backbites; a secret calumniator or detractor.  [1913 Webster]

ROGET THESAURUS

backbiter

Detractor

N detractor, reprover, censor, censurer, cynic, critic, caviler, carper, word-catcher, frondeur, barracker, defamer, backbiter, slanderer, Sir Benjamin Backbite, lampooner, satirist, traducer, libeler, calumniator, dawplucker, Thersites, Zoilus, good-natured friend, reviler, vituperator, castigator, shrew, muckraker, disapprover, laudator temporis acti, black-mouthed, abusive.