Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class IV. Words Relating to the Intellectual FacultiesDivision (I) Formation of Ideas
Section V. Results of Reasoning
485. Unbelief. Doubt.
DOUBT (uncertainty) [See Uncertainty]; skepticism or scepticism, misgiving, demur; distrust, mistrust; misdoubt, suspicion, jealousy, scruple, qualm; onus probandi [L.].
INCREDIBILITY, incredibleness, incredulity, unbelievability.
AGNOSTIC, skeptic or sceptic; unbeliever [See Incredulity].
DOUBT; be doubtful (uncertain) [See Uncertainty]; doubt the truth of; be skeptical as to &c. adj.; diffide [obs.], distrust, mistrust; suspect, smoke, scent, smell, smell a rat [colloq.], have -, harbor -, entertain- -doubts, – suspicions; have one’s doubts.
throw doubt upon, raise a question; bring -, call- in question; question, challenge; dispute; deny [See Negation]; cause -, raise -, start -, suggest -, awake- a -doubt, – suspicion; cavil, wrangle, ergotize [rare].
DEMUR, stick at, pause, hesitate, shy at, scruple; stop to consider, waver.
hang in suspense, hang in doubt.
STAGGER, startle; shake -, stagger- one’s -faith, – belief.
DOUBTFUL (uncertain) [See Uncertainty]; disputable; unworthy -, undeserving- of -belief [See Belief]; questionable; suspect [archaic], suspicious; open to -suspicion, – doubt; staggering, hard to believe, incredible, unbelievable, not to be believed, inconceivable.
FALLIBLE (uncertain) [See Uncertainty]; undemonstrable; controvertible (untrue) [See Error].