Alphabetic O
| 13 | oppressive | adjective | See |
| 14 | outbreak | noun | See |
| 15 | onerous | adjective | See |
| 16 | operational | adjective | See |
| 17 | outrageous | adjective | See |
| 18 | overflowing | adjective | See |
| 19 | obsession | noun | See |
| 20 | offspring | noun | See |
| 21 | ordeal | noun | See |
| 22 | odious | adjective | See |
| 23 | ostentatious | adjective | See |
| 24 | overloaded | adjective | See |