denier

/dɪˈnaɪər/
noun
  1. A person who refuses to accept the truth or existence of something, especially something widely accepted.
    • Some deniers of the moon landing still spread conspiracy theories.
    • Climate change deniers often ignore scientific evidence.
    • He is a Holocaust denier, which is both false and offensive.
  2. A person who says that something is not true or refuses a request.
    • The denier of the allegations had no proof to back up his claims.
    • As a denier of the visa, the officer explained the reasons.
    • She was a denier of all responsibility for the accident.
Antonyms
What does "denier" mean? | whatsthatwordmean | whatsthatwordmean