Vilifier is a word used to describe someone who attacks, slanders, or speaks ill of another person or group. There are several synonyms that can be used in place of vilifier, including defamer, slanderer, libeler, traducer, detractor, calumniator, maligner, and denigrator. Each of these words carries a similar connotation of someone who spreads false or damaging information about others with the intention of harming their reputation. It is important to be mindful of our words and actions and to avoid being a vilifier or any of its synonyms to promote empathy and respect towards others.