| OPS, OPIS [1] | | |
| OPUS, -ERIS [1] | | |
| ORATĬO, -ŌNIS [2] | | |
| ORĀTOR, -ŌRIS [4] | | |
| ORBIS, -IS [2] | | |
| ORDO, -ĬNIS [1] | | |
| ORĪGO, -ĬNIS [4] | | |
| OS, ORIS [1] | | |
| OS, OSSIS [3] | | |
| PALUS, -UDIS [4] | | |
| PARENS, -ENTIS [1] | | |
| PARIES, -ĒTIS [3] | | |
| PARS, -TIS [1] | | |
| PATER, -TRIS [1] | | |
| PAUPĒRTAS, -ĀTIS [3] | | |
| PAX, PACIS [1] | | |
| PECTUS, -ŎRIS [1] | | |
| PECUS, -ŎRIS [3] | | |
| PEDES, -ĬTIS [3] | | |
| PES, PEDIS [1] | | |
| PIETAS, -ĀTIS [3] | | |
| PLEBS, -BIS [2] | | |