| Main Entry: | |
| Part of Speech: | noun |
| Definition: | unfaithfulness |
| Synonyms: | apostasy, bad faith, betrayal of trust, breach of trust, breaking of faith, deceitfulness, disaffection, double-dealing, faithlessness, falseness, falsity, inconstancy, infidelity, perfidiousness, perfidy, recreancy, sedition, seditiousness, subversive activity, treachery, treason, untrueness, violation |
| Antonyms: | faithfulness, loyalty, trueness, trustworthiness |
| Main Entry: | defection |
| Part of Speech: | noun |
| Definition: | abandonment |
| Synonyms: | alienation, apostasy, backsliding, deficiency, dereliction, desertion, disaffection, disloyalty, disownment, divorce, estrangement, failing, failure, faithlessness, forsaking, lack, parting, rebellion, recreancy, rejection, repudiation, retreat, revolt, separation, severance, sundering, tergiversation, withdrawal |
| Antonyms: | joining |
| Main Entry: | disaffection |
| Part of Speech: | noun |
| Definition: | alienation, estrangement |
| Synonyms: | animosity, antagonism, antipathy, aversion, breach, disagreement, discontent, dislike, disloyalty, dissatisfaction, hatred, hostility, ill will, repugnance, resentment, unfriendliness |
| Antonyms: | attraction, happiness, harmony, pleasure |
| Main Entry: | unfaithfulness |
| Part of Speech: | noun |
| Definition: | infidelity |
| Synonyms: | apostasy, bad faith, defection, dereliction, disloyalty, fickleness, improbity, inconstancy, perfidy, recreancy, treachery, treason |
| Antonyms: | faithfulness, loyalty |
| Main Entry: | ingratitude |
| Part of Speech: | noun |
| Definition: | ungratefulness |
| Synonyms: | boorishness, callousness, disloyalty, inconsiderateness, rudeness, thanklessness, thoughtlessness, unthankfulness |
| Antonyms: | appreciation, consideration, gratitude |
| Main Entry: | two-timing |
| Part of Speech: | noun |
| Definition: | unfaithfulness |
| Synonyms: | adultery, cheating, disloyalty |
| Main Entry: | false-heartedness |
| Part of Speech: | noun |
| Definition: | deceitfulness |
| Synonyms: | dishonesty, disloyalty, falseness, falsity, perfidiousness, perfidy, traitorousness, treacherousness, treachery, underhandedness, unfaithfulness |
| Main Entry: | falseness |
| Part of Speech: | noun |
| Definition: | faithlessness |
| Synonyms: | betrayal, deceit, deception, dishonesty, disloyalty, false-heartedness, falsification, falsity, infidelity, perfidiousness, perfidy, traitorousness, treacherousness, treachery, unfaithfulness |
| Notes: | a falsehood is a false statement, a lie, or untruth; falseness is the state of being false or untrue |
| Main Entry: | perfidiousness |
| Part of Speech: | noun |
| Definition: | faithlessness |
| Synonyms: | betrayal, disbelief, dishonesty, disloyalty, doubt, false-heartedness, falseness, falsity, fickleness, fraud*, inconstancy, infidelity, perfidy, skepticism, traitorousness, treacherousness, treachery, treason, unfaithfulness |