| Text | Length |
| Once Broadway's longest-running show | 40 |
| Once bitten, twice ___ | 22 |
| Once bitten, so to speak | 24 |
| Once bitten, say | 16 |
| Once before? | 12 |
| Once around, to an astronaut | 28 |
| Once around, in a way | 21 |
| Once around, for John Glenn | 27 |
| Once around the world | 21 |
| Once around the track | 21 |
| Once around the sun | 19 |
| Once around the pool | 20 |
| Once around the park, say | 25 |
| Once around the oval | 20 |
| Once around the moon, e.g. | 26 |
| Once around the course | 22 |
| Once around the Brickyard | 25 |
| Once around the block | 21 |
| Once around Sol | 15 |
| Once around a track | 19 |
| Once around a racetrack | 23 |
| Once around | 11 |
| Once and ___ | 12 |
| Once and quince, for example | 28 |
| Once and for ___ | 16 |
| Once and again | 14 |
| Once again part of an athletic clique? | 38 |
| Once again in control | 21 |
| Once again | 10 |
| Once across the Rio Grande? | 27 |
| Once across the pool | 20 |
| Once a year | 11 |
| Once ... | 8 |
| Once -- time | 12 |
| Once -- lifetime | 16 |
| Once -- blue moon | 17 |
| Once - lifetime connector | 25 |
| Once once | 10 |
| Once formerly | 14 |
| Once | 4 |
| Onc ward treatment | 18 |
| Onboard GPS suggestion | 22 |
| Onboard affirmation | 19 |
| Onassis, to pals | 16 |
| Onassis, to JFK, Jr. | 20 |
| Onassis, to Jackie | 18 |
| Onassis, to his pals | 20 |
| Onassis, to his friends | 23 |
| Onassis, to friends | 19 |
| Onassis, informally | 19 |
| Onassis, in tabloids | 20 |
| Onassis, for short | 18 |
| Onassis, for one. | 17 |
| Onassis, for one | 16 |
| Onassis, familiarly | 19 |
| Onassis, briefly | 16 |
| Onassis, to his pals | 21 |
| Onassis's X | 15 |
| Onassis's nickname | 22 |
| Onassis' X | 14 |
| Onassis' nickname | 21 |
| Onassis who married Jackie | 26 |
| Onassis to pals | 15 |
| Onassis patriarch | 17 |
| Onassis or Meyers | 17 |
| Onassis of shipping | 19 |
| Onassis nickname | 16 |
| Onassis et al. | 14 |
| Onassis and others | 18 |
| Onassis and Fleischer | 21 |
| Onassis familiarly | 19 |
| Onassis | 7 |
| Onagers: Fr. | 12 |
| Onagers | 7 |
| Onager, in Oise | 15 |
| Onager, for one | 15 |
| Onager, for example | 19 |
| Onager, e.g. | 12 |
| Onager treading insect? | 23 |
| Onager or dunce | 15 |
| Onager | 6 |
| On: Prefix | 10 |
| On/off ___ | 10 |
| On/off wall device | 18 |
| On/off switch | 13 |
| On/off routes | 13 |
| On/off ramp pattern | 19 |
| On/off points: Abbr. | 20 |
| On-___ (rumor) | 14 |
| On-___ (bit of gossip) | 22 |
| On-track Bobby | 14 |
| On-tour baby watcher | 20 |
| On-time tax return? | 19 |
| On-time stat, perhaps | 21 |
| On-the-way-out PC component | 27 |
| On-the-water front | 18 |
| On-the-town time for many | 25 |
| On-the-spot TV programs | 23 |
| On-the-spot reporter | 20 |
| On-the-spot name | 16 |
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