plural of true believer

plural of non-believer

plural of Old Believer

plural of crypto-believer

(idiomatic) You need to see something to believe it; visible facts cannot be denied. / (idiomatic) I am skeptical about your claim.

Be assured; be certain. / Used other than figuratively or idiomatically: see believe, me.

alternative spelling of nonbeliever

someone who shares one's faith; a brother in faith

(childish) The quality or act of pretending; acting as if something is true when in fact one knows it is not.

(idiomatic, childish) To pretend or imagine.