Synonyms for Perfidiousness:

• n.

  •attribute (noun)
  • perfidy,
  • perfidiousness.
  •deception (noun)
  • duplicity.
  •dishonesty (noun)
  • Improbity,
  • criminality,
  • infamy,
  • Hocuspocus,
  • unscrupulousness,
  • wiliness,
  • chicane,
  • fourberie,
  • criminalities,
  • Hanky Panky,
  • cunnings,
  • insidiousness,
  • fraudulence,
  • indirection,
  • chicanes,
  • sharp practice,
  • Double dealing.
  •disloyalty (noun)
  • dis affection,
  • dis-loyalty,
  • breach trust,
  • un truenesses,
  • dis affections,
  • bad faiths,
  • dis-loyalties,
  • un-truenesses,
  • in constancy,
  • in-constancies,
  • betrayal trust,
  • dis-affections,
  • dis loyalties,
  • un-trueness,
  • un trueness,
  • in-constancy,
  • untruenesses,
  • in constancies,
  • dis loyalty,
  • dis-affection.
  •duplicity (noun)
  • one upmanship,
  • dis semblance,
  • dis-semblance,
  • judas kisses,
  • dis-simulation,
  • dis-simulations,
  • dirty dealings,
  • twofacedness,
  • twonesses,
  • dis simulation,
  • oneupmanship,
  • dis-semblances,
  • dis semblances,
  • dis simulations,
  • stab back,
  • two facedness,
  • dissimulations.
  •faithlessness (noun)
  • disbelief,
  • fraud,
  • betrayal,
  • treason,
  • skepticism,
  • doubt.
  •false-heartedness (noun)
  • false heartedness.
  •falsity (noun)
  • dis-ingenuousnesses,
  • un-reality,
  • un-candidnesses,
  • un reality,
  • un candidnesses,
  • in-sincerities,
  • un truths,
  • in accuracies,
  • deceptivenesses,
  • in-accuracy,
  • un truth,
  • mis-representations,
  • un-realities,
  • dis ingenuousness,
  • un-candidness,
  • in sincerity,
  • in-accuracies,
  • dis ingenuousnesses,
  • mis-representation,
  • in sincerities,
  • dis-ingenuousness,
  • uncandidnesses,
  • un-truths,
  • un realities,
  • in accuracy,
  • in-sincerity,
  • mis representations,
  • un candidness,
  • un-truth,
  • mis representation.
  •indirection (noun)
  • in-direction,
  • in-directions,
  • in directions,
  • in direction.
  •infidelity (noun)
  • Extramarital Relations.
  •treachery (noun)
  • puton,
  • stab the back,
  • fast shuffles,
  • buncos.
  •underhandedness (noun)
  • under-handednesses,
  • under handedness,
  • under-handedness,
  • under handednesses.

• Other synonyms:

  •
  • unfaithfulness.
  •
  • infidelity.
  •Other relevant words:
  • bribery,
  • wile,
  • trickery,
  • deceit,
  • deceitfulness,
  • continue,
  • manslaughter,
  • conspiracy,
  • deserted,
  • skulduggery,
  • imposture,
  • venality,
  • foul play,
  • roguery,
  • Barratry,
  • job,
  • subversiveness,
  • homicide,
  • deception,
  • graft,
  • murder,
  • shuffle,
  • jobbery,
  • crime,
  • corruption,
  • mouth honor,
  • chicanery,
  • unfairness,
  • Jobbing,
  • knavery,
  • dirty work,
  • guile,
  • flattery,
  • nepotism,
  • rascality.

Antonyms for Perfidiousness:

• n.

  • faithlessness
    belief, faithfulness, honesty, loyalty, truthfulness, trust, fidelity, devotion, fairness.
  • Other antonyms:
    constancy, faith, trustworthiness, fealty, devotedness, dependability, steadfastness, reliability, staunchness, allegiance.

Hypernym for Perfidiousness:

• n.

  • attribute
    insidiousness.

Hyponym for Perfidiousness:

• n.

  • attribute
    disloyalty.