'Rebuker' definitions:

Definition of 'rebuker'

From: WordNet
noun
Someone who finds fault or imputes blame [syn: upbraider, reprover, reproacher, rebuker]

Definition of 'Rebuker'

From: GCIDE
  • Rebuker \Re*buk"er\ (r[-e]*b[=u]k"[~e]r), n. One who rebukes. [1913 Webster]