Fallacious

(a.) Illogical; fitted to deceive; misleading; delusive; as, fallacious arguments or reasoning.

Thesaurus Entries

Albigensian, Arian, Barmecidal, Barmecide, Catharist, Donatist, Ebionitist, Erastian, Gnostic, Jansenist, Jansenistic, Jovinianist, Jovinianistic, Lollard, Manichaean, Monophysite, Monophysitic, Montanist, Montanistic, Pelagian, Sabellian, Waldensian, Wyclifite, aberrant, abroad, absonant, adrift, airy, all abroad, all off, all wrong, amiss, antinomian, apocryphal, apparent, apparently sound, apparitional, askew, astray, at fault, autistic, awry, beguiling, beside the mark, casuistic, catchy, chimeric, colorable, contradictory, contrary to fact, contrary to reason, corrupt, deceiving, deceptive, defective, deluding, delusional, delusionary, delusive, delusory, dereistic, deviant, deviational, deviative, disingenuous, distorted, dreamlike, dreamy, dubious, emanationist, empty, errant, erring, erroneous, FALSE, fantastic, faultful, faulty, fishy, flawed, hallucinatory, heretical, heterodox, hollow, hylotheist, hylotheistic, illogical, illusional, illusionary, illusive, illusory, imaginary, in error, inauthentic, inconclusive, incongruous, inconsequent, inconsequential, inconsistent, insincere, invalid, irrational, jesuitic, loose, mad, misleading, nonorthodox, nonrational, nonscientific, not following, not right, not true, off, off the track, ostensible, out, overrefined, oversubtle, pantheist, pantheistic, paralogical, peccant, perverse, perverted, phantasmagoric, phantasmal, phantom, philosophistic, plausible, questionable, reasonless, seeming, self-annulling, self-contradictory, self-deceptive, self-deluding, self-refuting, senseless, sophistic, sophistical, specious, spectral, straying, supposititious, trickish, tricksy, tricky, truthless, unaccepted, unactual, unapproved, unauthentic, unauthoritative, uncanonical, unconnected, unfactual, unfounded, unorthodox, unphilosophical, unproved, unreal, unreasonable, unscientific, unscriptural, unsound, unsubstantial, untrue, visionary, wide, without reason, wrong