Synonyms of faithless

2 Syllables

fickle, disloyal, dubious, untrue, recreant, corrupt, truthless, cheating, unloyal, jivey, doubting, false, fickler

3 Syllables

traitorous, deceitful, unstable, inconstant, treacherous, skeptical, capricious, dishonest, two-faced, two-timing, foresworn, untruthful, freethinking, free-thinking, fluctuating, phoniness, perfidious, treasonous, scoundrelly, undevout, wavering, changeful, pecksniffian, unfaithful, changeable, pharisaic, moonlighting

4 Syllables

untrustworthy, unreliable, double-dealing, falsehearted, unpatriotic, insincere, unbelieving, undutiful, mythomaniac, irreligious, pigeonhearted, unconverted, treasonable, pharisaical, double-crossing, profiteering

5 Syllables

hypocritical, adulterine