Synonyms of unreliable

1 Syllable

weak, fake, sham

2 Syllables

wonky, fickle, tippier, tippy, errant, faithless, rootless, false, pseudo, dubious, sneakier, skittish, untrue, tricky, unloyal, specious, flawed, faultier, shifty, unsound, sneaky, hollow, dodgy, way-off, faulty, lying, jivey, sneakiest

3 Syllables

deceitful, erratic, pretended, makeshift, unshielded, unbacked, unproven, furtive, inconstant, capricious, unsure, fallible, unpunctual, precarious, underhand, moonlighting, incorrect, unstable, erroneous, mistaken, treacherous, errable, derelict, perjurious, perfidious, pharisaic, foresworn, untrusty, unsteady, fly-by-night, wavering, changeful, pecksniffian, unsafe, mutable, unfaithful, changeable, uncertain

4 Syllables

untrustworthy, delusive, implausible, questionable, unconvincing, meretricious, underhanded, agitable, unconfirmed, falsehearted, deceptive, irregular, alarmable, anecdotal, unsupported, reversible, nonuniform, imprecise, uncareful, impugnable, revocable, permutable, vacillating, unconverted, pharisaical

5 Syllables

disreputable, unpredictable, controvertible, irresponsible, temperamental, unretentive, adulterine, hypocritical, undependable, inaccurate, commutative

6 Syllables

hallucinatory