N  unbelief doubt, 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, 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, cum grano salis, with a grain of salt, with grains of allowance, fronti nulla fides, nimium ne crede colori, timeo Danaos et dona ferentes, I fear the Greeks even when bearing gifts, beware of Greeks bearing gifts, credat Judaeus Apella, let those believe who may, ad tristem partem stenua est suspicio.

if not, last but not least, last not least, more often than not, not, not a bit, not absolutely, not accept, not admit, not all there, not at all, not bad, not budge, not buy, not by a blame sight, not by a long sight, not care for, not comparable, not compare, not cricket, not delayed, not done, not due, not easy, not far, not fluently, not guilty, not hesitate, not in the mood, not intrusive, not kosher, not late, not listed, not listen, not long, not mind, not only, not right, not suitably, not surprised, not swallow, not to be had, not to mention, not touch, not traded, not true, not very likely, not with it, not yet