Blackwash is a term that refers to "the defamation or vilification of a person or group of people". Synonyms for blackwash include defamation, libel, slander, calumny, denigration, disparagement, and vilification. These words all refer to ways of damaging someone's reputation by spreading false information, spreading negative rumors, or criticizing them unjustly. It is important to note that all of these actions are harmful and can have lasting effects on a person's life. It is important to always be truthful and respectful when expressing opinions or criticisms about others, and to avoid using derogatory or harmful language.