| Once more, colloquially | 23 |
| Once more than two times | 24 |
| Once more than once | 19 |
| Once more or no more | 20 |
| Once more in the country? | 25 |
| Once more from the top | 22 |
| Once more to Lil Abner | 23 |
| Once more | 9 |
| Once minus tres | 15 |
| Once menos ocho | 15 |
| Once lived | 10 |
| Once known as, in society pages | 31 |
| Once known as | 13 |
| Once kept | 9 |
| Once it was enough | 18 |
| Once in ___ moon | 16 |
| Once in a while (with "now") | 38 |
| Once in a while | 15 |
| Once in a long while | 20 |
| Once in a great while | 21 |
| Once in a blue __ | 17 |
| Once in a blue moon, old-style | 30 |
| Once in a blue moon | 19 |
| Once in --- moon | 16 |
| Once follower | 13 |
| Once existed | 12 |
| Once every 365 days | 19 |
| Once every 24 months | 20 |
| Once every 12 months | 20 |
| Once doubled | 12 |
| Once did | 8 |
| Once called, in wedding notices | 31 |
| Once called | 11 |
| 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 |