| bed-swerver | person unfaithful to the marriage-bed, adulterer/adulteress |
| cuckold | [mocking name] dishonour a man by making his wife unfaithful |
| cuckold | [mocking name] man with an unfaithful wife |
| detection | exposure, revelation, evidence of unfaithfulness |
| disloyal | unfaithful, adulterous, two-timing |
| false | disloyal, faithless, inconstant, unfaithful |
| false a | unfaithfully, disloyally, inconstantly |
| Guinevere | [pron: 'gwineveer] legendary Queen of Britain, known for her unfaithfulness to her husband |
| loose-wived | with an unfaithful wife |
| perfidious | treacherous, unfaithful, disloyal |
| truant | play truant, be unfaithful |
| unjust | unfaithful, false [to honour] |
| untrue | untruly, unfaithfully |
| untruth | disloyalty, unfaithfulness, infidelity |