| Text | Length |
| Operator's item | 19 |
| Operator's line | 19 |
| Operator's need | 19 |
| Operator's wear | 19 |
| Operator, of a sort | 19 |
| Operator, perhaps | 17 |
| Operator: Abbr. | 15 |
| Operetta composer | 17 |
| Operetta division | 17 |
| Operetta man | 12 |
| Operetta part | 13 |
| Operetta princess | 17 |
| Operetta roles | 14 |
| Operetta team | 13 |
| Operettist Franz | 16 |
| Ophelia or Horatio | 18 |
| Ophelia's love | 18 |
| Ophidian feature | 16 |
| Ophidian group | 14 |
| Ophidian sound | 14 |
| Ophidian sounds | 15 |
| Ophidian toxin | 14 |
| Ophidianlike | 12 |
| Ophidids' kin | 17 |
| Ophthalmic concern | 18 |
| Ophthalmic sore | 15 |
| Ophthalmic swelling | 19 |
| Ophthalmologist | 15 |
| Ophthalmology case | 18 |
| Opiate, e.g. | 12 |
| Opie or Richie | 14 |
| Opie or Turner | 14 |
| Opie portrayer | 14 |
| Opie's aunt | 15 |
| Opie's dad | 14 |
| Opie's guardian | 19 |
| Opie's watcher | 18 |
| Opie, off the set | 17 |
| Opie, off-screen | 16 |
| Opie, really | 12 |
| Opine indiscreetly | 18 |
| Opine online | 12 |
| Opine rudely | 12 |
| Opines online | 13 |
| Opinion add-on | 14 |
| Opinion analyzer | 16 |
| Opinion barometer | 17 |
| Opinion changer | 15 |
| Opinion collection | 18 |
| Opinion column | 14 |
| Opinion column site | 19 |
| Opinion deliverer | 17 |
| Opinion giver | 13 |
| Opinion introducer | 18 |
| Opinion leader? | 15 |
| Opinion leaders? | 16 |
| Opinion of others? | 18 |
| Opinion offerers | 16 |
| Opinion opener | 14 |
| Opinion or judgment | 19 |
| Opinion piece | 13 |
| Opinion pieces | 14 |
| Opinion poll | 12 |
| Opinion poll fig. | 17 |
| Opinion poll no. | 16 |
| Opinion sample | 14 |
| Opinion sampler | 15 |
| Opinion sampling | 16 |
| Opinion start | 13 |
| Opinion survey | 14 |
| Opinion surveys | 15 |
| Opinion takers | 14 |
| Opinion tester | 14 |
| Opinion to cherish? | 19 |
| Opinion website | 15 |
| Opinion, as it were | 19 |
| Opinion: Prefix | 15 |
| Opinion; view | 13 |
| Opinionated Bill | 16 |
| Opinionated equine | 18 |
| Opinionated ones | 16 |
| Opinionated pieces | 18 |
| Opinionated work | 16 |
| Opinions offered | 16 |
| Opinions, e.g. | 14 |
| Opium byproduct | 15 |
| Opium compound | 14 |
| Opium derivative | 16 |
| Opium farmer, often | 19 |
| Opium flower | 12 |
| Opium locale | 12 |
| Opium lounge | 12 |
| Opium origin | 12 |
| Opium product | 13 |
| Opium source | 12 |
| Oplasm opener | 13 |
| Oporto greeting | 15 |
| Oporto native, e.g. | 19 |
| Oporto's river | 18 |
| Opossum shrimp | 14 |
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