| extracurricular activity(expression, thing, infidelity) | |
| extramarital affair(expression, thing, infidelity) | |
| extramarital sex(expression, idiom) | |
| facts of life(noun, expression, idiom, reproduction, generation) | |
| faux | |
| faux pas(expression, idiom, impurity) | |
| fling(thing, infidelity) | |
| fucking | |
| gallantry | |
| generation(noun, reproduction, sexuality) | |
| going to bed with someone | |
| hanky-panky(thing, infidelity) | |
| hellish | |
| hooking(noun, whoredom) | |
| how's your father | |
| howler | |
| hustling(noun, whoredom) | |
| iconolatry | |
| idolatry | |
| illicit intercourse(expression, idiom) |
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| APA | Smart Define. (2015). fornication thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fornication/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "fornication thesaurus" https://smartdefine.org/fornication/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, fornication thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fornication/thesaurus/synonyms>. |
| MLA | Smart Define. "fornication thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/fornication/thesaurus/synonyms> |