| ___ out (awaits anxiously) | 26 |
| ___ out (avoid participation) | 29 |
| ___ out (attracted attention) | 29 |
| ___ out (attained with effort) | 30 |
| ___ out (attack verbally) | 25 |
| ___ out (arranged) | 18 |
| ___ out (act boldly) | 20 |
| ___ out (achieving with difficulty) | 35 |
| ___ out (abolish) | 17 |
| ___ out | 7 |
| ___ oui (yes, of course) | 24 |
| ___ other than | 14 |
| ___ other (uniquely) | 20 |
| ___ other (matchlessly) | 23 |
| ___ other | 9 |
| ___ Oscar (entree) | 18 |
| ___ oryx (antelope with curved horns) | 37 |
| ___ Orthodox | 12 |
| ___ Oro, in Spanish Sahara | 26 |
| ___ Oro, in NW Africa | 21 |
| ___ Oro, African bay | 20 |
| ___ Oro, Africa | 15 |
| ___ Oro (part of Spanish Sahara) | 32 |
| ___ Oro | 7 |
| ___ organs | 10 |
| ___ Organa, "Star Wars" princess | 42 |
| ___ Organa Solo | 15 |
| ___ Oreo (bite-sized treat) | 27 |
| ___ Oreille (Idaho lake) | 24 |
| ___ ordinaire | 13 |
| ___ order (usable) | 18 |
| ___ order (Sen. McCarthy's questions) | 41 |
| ___ order (political slogan) | 28 |
| ___ order (not functioning) | 27 |
| ___ order (align) | 17 |
| ___ Order | 9 |
| ___ Orchestra (popular 30's band) | 37 |
| ___ Orchestra ('70s jazz-rock fusion band) | 46 |
| ___ orch. | 9 |
| ___ Orange, New Jersey | 22 |
| ___ Orange, N.J. | 16 |
| ___ Orange (Vietnam War defoliant) | 34 |
| ___ orange (inedible fruit) | 27 |
| ___ orange (bowwood) | 20 |
| ___ orange | 10 |
| ___ ora (N.Z. toast) | 20 |
| ___ or woe | 10 |
| ___ or twice | 12 |
| ___ or swim | 11 |
| ___ or nothing | 14 |
| ___ or no | 9 |
| ___ or never | 12 |
| ___ or nay | 10 |
| ___ or fiction | 14 |
| ___ or con | 10 |
| ___ or butter | 13 |
| ___ Optics (telescope maker) | 28 |
| ___ optics | 10 |
| ___ opposition (be uncontested) | 31 |
| ___ opposites | 13 |
| ___ opposite | 12 |
| ___ Opey Dildock, of comics | 27 |
| ___ operation: division calculation in computing | 48 |
| ___ operas (Gilbert and Sullivan works) | 39 |
| ___ operandi (ways) | 19 |
| ___ operandi (ways of working) | 30 |
| ___ operandi (ways of operating) | 32 |
| ___ operandi (procedures) | 25 |
| ___ operandi (methods) | 22 |
| ___ operandi | 12 |
| ___ Opera of Chicago | 20 |
| ___ opera | 9 |
| ___ open road | 13 |
| ___ open (give access) | 22 |
| ___ onto (take possession of) | 29 |
| ___ onto (take hold of) | 23 |
| ___ onto (grab) | 15 |
| ___ onto (grab hold of) | 23 |
| ___ onto | 8 |
| ___ Ono Lennon | 14 |
| ___ Ono | 7 |
| ___ only (sans pictures) | 24 |
| ___ only | 8 |
| ___ Online (long-running MMORPG) | 32 |
| ___ Online (long-running MMORPG created by Lord British) | 56 |
| ___ onion (squill) | 18 |
| ___ onion | 9 |
| ___ oneself on (had an ego about) | 33 |
| ___ oneself of | 14 |
| ___ oneself (skip) | 18 |
| ___ oneself (share private thoughts) | 36 |
| ___ oneself (mimicked a serial killer, perhaps) | 47 |
| ___ oneself (manage alone) | 26 |
| ___ oneself (goes) | 18 |
| ___ oneself (endeavor) | 22 |
| ___ one-eighty (turns around) | 29 |
| ___ one-eighty | 14 |
| ___ one, purl two | 17 |
| ___ one's words (soften) | 28 |
| ___ one's words (recant) | 28 |