| 1. | O domus anti, quam dispari domino dominaris ! | |
| 2. | Ob textoris erratum | |
| 3. | Obedientia felicitatis mater | |
| 4. | Objicere canibus agnos | |
| 5. | Obliquus cursus | |
| 6. | Oblivionis campus | |
| 7. | Obolo dignus | |
| 8. | Obolum reperit Parnoetes | |
| 9. | Obsequium amicos, veritas odium parit | |
| 10. | Obtestatio veterum meritorum | |
| 11. | Obtorto collo | |
| 12. | Obtrudere palpum | |
| 13. | Obturbas frustra velut unda | |
| 14. | Obviis ulnis | |
| 15. | Occasione duntaxat opus improbitati | |
| 16. | Occisionis ala | |
| 17. | Occultae musices nullus respectus | |
| 18. | Octapedes | |
| 19. | Octipedem excitas | |
| 20. | Oculatae manus | |