Definition for Unfaithfulness:

• Neglect or violation of vows or promises; breach of confidence or trust reposed.

Synonyms for Unfaithfulness:

• n.

  •
  • perfidy,
  • treachery,
  • trust,
  • continue,
  • disloyalty.
  •impiety (noun)
  • sacrilege,
  • blasphemy,
  • sinfulness,
  • atheism,
  • irreverence,
  • waywardness,
  • irreligiousness,
  • godlessness,
  • ungodliness,
  • unholiness,
  • impiety,
  • profanity.
  •infidelity (noun)
  • dereliction,
  • apostasy,
  • treason,
  • bad faith,
  • Recreancy,
  • Improbity.

• Other synonyms:

  •adultery
  • fornication.
  •infidelity
  • infidelity.
  •Other relevant words:
  • deceitfulness,
  • changeableness,
  • MALA FIDES,
  • misconduct,
  • breach of trust,
  • Barratry,
  • deceit,
  • dishonesty,
  • deception,
  • insidiousness,
  • business,
  • breach of promise,
  • irregularity,
  • capriciousness,
  • backstabbing,
  • duplicity,
  • entanglement,
  • error,
  • illicit love,
  • Unsteadfastness,
  • Infidelities,
  • romance,
  • falsehood,
  • amour,
  • flirtation,
  • triangle,
  • unsteadiness,
  • untrustworthiness,
  • breach of faith,
  • heresy,
  • love affair,
  • eternal triangle,
  • two-timing,
  • mercurialness,
  • adultery,
  • forbidden love,
  • variability,
  • liaison,
  • disaffection,
  • cuckoldry,
  • mutability,
  • dishonour,
  • Unfaith,
  • disingenuousness,
  • Hanky Panky,
  • cheating,
  • inconsistency,
  • volatility,
  • affair,
  • intrigue,
  • untrueness.

Antonyms for Unfaithfulness:

• n.

  • infidelity
    loyalty, fidelity, devotion, faithfulness.
  • Other antonyms:
    defense, dedication, protection, reliability, safeguard, dependability, allegiance, faith, constancy, fealty, steadfastness, staunchness, devotedness, trustworthiness, honesty, shield.