| Text | Length |
| Omaha-to-K.C. dir. | 18 |
| Obsolete map abbr. | 18 |
| Old atlas initials | 18 |
| Onetime Rus. state | 18 |
| Old geog. initials | 18 |
| Old country: Abbr. | 18 |
| Old pol. divisions | 18 |
| Old draft initials | 18 |
| Onetime JFK lander | 18 |
| Onetime boom maker | 18 |
| Old J.F.K. arrival | 18 |
| Onetime JFK sights | 18 |
| Once-pricey flyers | 18 |
| Old West transport | 18 |
| On the picket line | 18 |
| Ollie's costar | 18 |
| One-seat carriages | 18 |
| Office Depot rival | 18 |
| O'Toole is one | 18 |
| Oddballs draw them | 18 |
| Observatory sights | 18 |
| Old Glory features | 18 |
| Open fire, perhaps | 18 |
| On-base pct., e.g. | 18 |
| Oregon or Oklahoma | 18 |
| Oregon or New York | 18 |
| One of a set of 50 | 18 |
| Old corset support | 18 |
| One with endurance | 18 |
| Operate the tiller | 18 |
| Operated, in a way | 18 |
| Oktoberfest object | 18 |
| Office-pool member | 18 |
| Office transcriber | 18 |
| Office pool worker | 18 |
| Order to a printer | 18 |
| Olla podrida, e.g. | 18 |
| Olla-podrida, etc. | 18 |
| Of a mark of shame | 18 |
| Ocean-bottom hider | 18 |
| Old TWA hub: Abbr. | 18 |
| Opera house attire | 18 |
| Obtained illegally | 18 |
| Obstruct inquiries | 18 |
| One of a film trio | 18 |
| Obey the red light | 18 |
| Obeyed a red light | 18 |
| Orders to a broker | 18 |
| Onetime radio show | 18 |
| Overhead bin, e.g. | 18 |
| O. Henry offerings | 18 |
| One can be tracked | 18 |
| One who goes free? | 18 |
| One of three popes | 18 |
| Organ knobs: Abbr. | 18 |
| Often-drawn object | 18 |
| Oscar-winner Meryl | 18 |
| Oscar winner: 1979 | 18 |
| Oft-numbered roads | 18 |
| Organic frameworks | 18 |
| OH, OK, etc., e.g. | 18 |
| Oft-numbered rtes. | 18 |
| Office of records? | 18 |
| Ornamental buttons | 18 |
| Occasion for roses | 18 |
| Oinker's abode | 18 |
| Ophthalmology case | 18 |
| Ophthalmic concern | 18 |
| Optical intrusion? | 18 |
| Ocular irritations | 18 |
| Optical annoyances | 18 |
| Oleg's concern | 18 |
| Overpower by force | 18 |
| Old Turkish leader | 18 |
| Ottoman condiment? | 18 |
| Orangutan, perhaps | 18 |
| One rising at dawn | 18 |
| Once-a-week menace | 18 |
| Outsides of objets | 18 |
| Outer faces: Abbr. | 18 |
| Overload with work | 18 |
| One-for-one trades | 18 |
| One with influence | 18 |
| One taking an oath | 18 |
| Omnivorous animals | 18 |
| Offered under oath | 18 |
| One who goes along | 18 |
| One has one: Abbr. | 18 |
| One-wd. definition | 18 |
| Opposites of ants. | 18 |
| Organized patterns | 18 |
| Old Bahamas native | 18 |
| Opposite of purify | 18 |
| Old Ethiopian coin | 18 |
| Outlandish stories | 18 |
| Oversized beer can | 18 |
| Osprey's asset | 18 |
| One behind another | 18 |
| One-piece swimwear | 18 |
| Oncle's spouse | 18 |
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