| Text | Length |
| "On your feet!" | 25 |
| "On your ___!" | 24 |
| "On Your ___" | 23 |
| "On ___ Day . . . " | 29 |
| "On ___ Day" | 22 |
| "On ___ of Bibles" | 28 |
| "On ___ Old Smokey" | 29 |
| "On ___ the show!" | 28 |
| "On ___ Toes" | 23 |
| "On/off" surrounder | 29 |
| "Once --- a time" | 27 |
| "Once again . . ." | 28 |
| "Once again ..." | 26 |
| "Once more . . ." | 27 |
| "Once more ..." | 25 |
| "Once upon ---" | 25 |
| "Once upon ___ ..." | 29 |
| "Once upon ___" | 25 |
| "Once __ ..." | 23 |
| "Once ___ . . . " | 27 |
| "Once ___ ..." | 24 |
| "Once ___ a . . . " | 29 |
| "Once ___ a time" | 27 |
| "Once ___ Enough" | 27 |
| "Once ___ Mattress" | 29 |
| "Once ___ time ..." | 29 |
| "Once ___ time" | 25 |
| "Once ___ time..." | 28 |
| "Once" won eight | 26 |
| "Once", for one | 25 |
| "Ondine" playwright | 29 |
| "One Day --- Time" | 28 |
| "One Day at ___" | 26 |
| "One Day __ Time" | 27 |
| "One Day ___ Time" | 28 |
| "One for ___" | 23 |
| "One Hoss ___" | 24 |
| "One L" author | 24 |
| "One man, ___" | 24 |
| "One Mic" performer | 29 |
| "One Mic" rapper | 26 |
| "One more song!" | 26 |
| "One more time!" | 26 |
| "One more time" | 25 |
| "One more, please" | 28 |
| "One of ___ days" | 27 |
| "One sec ..." | 23 |
| "One spade," e.g. | 27 |
| "One touch" sport | 27 |
| "One way" symbol | 26 |
| "One __ or two?" | 26 |
| "One ___ Beyond" | 26 |
| "One ___ customer" | 28 |
| "One ___ Family" | 26 |
| "One ___ fits all" | 28 |
| "One ___ hope" | 24 |
| "One ___ Jump" | 24 |
| "One ___ or two?" | 27 |
| "One ___, please" | 27 |
| "One" on a coin | 25 |
| "One" on a one | 24 |
| "One" on a penny | 26 |
| "One," for one | 24 |
| "One-and-a-two" man | 29 |
| "One-hoss" vehicle | 28 |
| "One-l lama" poet | 27 |
| "One-touch" sport | 27 |
| "One-way" sign | 24 |
| "Onion ___ Network" | 29 |
| "Only a ___" | 22 |
| "Only as __ resort" | 29 |
| "Only God can ___" | 28 |
| "Only kidding!" | 25 |
| "Only Time ___" | 25 |
| "Only Time" singer | 28 |
| "Only You" band | 25 |
| "Only You" duo | 24 |
| "Ontario" anagram | 27 |
| "Onward!," in Italy | 29 |
| "Ooh la la!" | 22 |
| "Ooh!" accompanier | 28 |
| "Ooh" companions | 26 |
| "Ooh" follower | 24 |
| "Ooh, gross!" | 23 |
| "Ooh, send me!" | 25 |
| "Ooh, tasty!" | 23 |
| "Ooh, that hurts!" | 28 |
| "Ooh-la-la!" | 22 |
| "Ooky" family name | 28 |
| "Ooky" TV relative | 28 |
| "Oom Paul" was one | 28 |
| "Oompah" instrument | 29 |
| "Oompah" producers | 28 |
| "Oooh, ___ scared!" | 29 |
| "Oops! I goofed!" | 27 |
| "Oops!" (to a teen) | 29 |
| "Oops!" cause | 23 |
| "Oops!" elicitor | 26 |
| "Oops!" evoker | 24 |
| "Oops!" list | 22 |
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