unbeliever
1. [ noun ] (religion) someone who refuses to believe (as in a divinity)
Synonyms: nonbelieiver nonbeliever disbeliever
Related terms: nonreligious_person atheist materialist disbelieve
Similar spelling:   unbelievable
  unbelieving
  unbelief
  unbelievably
  unbelievingly
  unveiled
  unfueled
  unfelled
  unbeloved