disbeliever
NounWordNet 3.0
Noun (1)
- someone who refuses to believe (as in a divinity)Synonyms: nonbelieverunbeliever
Webster's Dictionary (GCIDE)
Disbeliever \Dis`be*liev"er\, n. One who disbelieves, or refuses belief; an unbeliever. Specifically, one who does not believe the Christian religion. --I. Watts. [1913 Webster]