N. unbelief, disbelief, misbelief, discredit, miscreance, infidelity, dissent, change of opinion, retraction, doubt, skepticism, scepticism, misgiving, demure, distrust, mistrust, cynicism, misdoubt, suspicion, jealousy, scruple, qualm, onus probandi, incredibility, incredibleness, incredulity, doubter, skeptic, cynic, unbeliever

V. disbelieve, discredit, not believe, misbelieve, refuse to admit, refuse to believe, doubt, be doubtful, doubt the truth of, be skeptical as to, diffide|, distrust, mistrust, suspect, smoke, scent, smell a rat, have doubts, harbor doubts, entertain doubts, suspicions, have one's doubts, demure, stick at, pause, hesitate, scruple, stop to consider, waver, hang in suspense, hang in doubt, throw doubt upon, raise a question, bring in, call in question, question, challenge, dispute, deny, cavil, cause a doubt, raise a doubt, start a doubt, suggest a doubt, awake a doubt, make suspicion, ergotize, startle, stagger, shake one's faith, shake one's belief, stagger one's faith, stagger one's belief

Adj. unbelieving, skeptical, sceptical, incredulous as to, skeptical as to, distrustful as to, shy as to, suspicious of, doubting, doubtful, disputable, unworthy of, undeserving of belief, questionable, suspect, suspicious, open to suspicion, open to doubt, staggering, hard to believe, incredible, unbelievable, not to be believed, inconceivable, impossible, fallible, undemonstrable, controvertible

Adv. cum grano salis, with grains of allowance

Phr. fronti nulla fides, nimium ne crede colori, "timeo danaos et dona ferentes", beware of greeks bearing gifts, credat judaeus apella, let those believe who may, ad tristem partem stenua est suspicio