Denigrate
Part of speech: verb
Definition: To criticise so as to besmirch; traduce, disparage or defame. To treat as worthless; belittle, degrade or disparage. To blacken.
Example sentence: People will remember that the Tea Party was co-opted and funded by billion-dollar corporations, and that it was supported by Fox News and other outlets with the same vigor with which they attempt to denigrate the Occupy protesters.
Asperse
Part of speech: verb
Definition: To sprinkle or scatter (liquid or dust).To falsely or maliciously charge another.