Synonyms of perfidiousness

2 Syllables
twoness, bunco, slyness
3 Syllables
treacheries, perfidy, treachery, shadiness, disloyalty, shiftiness, sneakiness, falsity, untrueness, faithlessness, trickiness
4 Syllables
inconstancy, duplicity, traitorousness, dishonesty, indirections, treacherousness, indirection, insidiousness
5 Syllables
infidelities, infidelity, underhandedness, falseheartedness, in-fidelity