| noticeable(adjective, great, unusual, important, famous) |
| novel(adjective, separate, unusual, strange, exceptional) |
| observable(adjective, great, unusual, important, famous) |
| odd(adjective, extraordinary, unusual, strange, exceptional) |
| okay |
| one for the book(expression, adjective, idiom, noble, grand) |
| one for the books(noun, expression, idiom, confusion, experience) |
| other |
| out of sight(expression, idiom) |
| out of the ordinary(expression, adjective, idiom, separate, exceptional) |
| outstanding(adjective, great, unusual, important, superb) |
| overwhelming(adjective, awful, wonderful, noble, grand) |
| patent(adjective, unusual, important, exceptional, remarkable) |
| peachy-keen |
| phenomenal(adjective, unusual, strange, superb, exceptional) |
| preeminent(adjective, outstanding, serious, prominent, distinguished) |
| prodigious(adjective, extraordinary, unusual, strange, exceptional) |
| prominent(adjective, great, unusual, important, famous) |
| pronounced(adjective, unusual, outstanding, serious, prominent) |
| queer(adjective, extraordinary, unusual, strange, exceptional) |