| Text | Length |
| OPEC, for one | 13 |
| OPEC's export | 17 |
| OPEC's concern | 18 |
| OPEC units: abbr. | 17 |
| OPEC unit: Abbr. | 16 |
| OPEC subject | 12 |
| OPEC quantities | 15 |
| OPEC product | 12 |
| OPEC participant | 16 |
| OPEC moneymaker | 15 |
| OPEC members | 12 |
| OPEC member: Abbr. | 18 |
| OPEC meeting VIP | 16 |
| OPEC measures | 13 |
| OPEC measure | 12 |
| OPEC is one: Abbr. | 18 |
| OPEC investigation? | 19 |
| OPEC holding | 12 |
| OPEC customer | 13 |
| OPEC country | 12 |
| OPEC concern | 12 |
| OPEC commodity | 14 |
| OPEC co-founder | 15 |
| OPEC charter member | 19 |
| OPEC for example | 17 |
| Opéra-___ | 12 |
| Opéra division | 17 |
| Opaquely white | 14 |
| Opaque, in a way | 16 |
| Opaque watercolors | 18 |
| Opaque gemstone | 15 |
| Opaque eye layer | 16 |
| Opaque barite | 13 |
| Opals and rubies | 16 |
| Opals and emeralds | 18 |
| Opalescent gems | 15 |
| Opalescent gem | 14 |
| Opal, essentially | 17 |
| Opal's mo. | 14 |
| Opal or topaz | 13 |
| Opal or onyx | 12 |
| Opal or garnet | 14 |
| Opal finish? | 12 |
| Opal and onyx | 13 |
| Opal alternative | 16 |
| Opa-___, Florida | 16 |
| Opa-___, Fla. | 13 |
| Opa- --, Florida | 16 |
| Op-ed, typically | 16 |
| Op-Ed pieces | 12 |
| Op-Ed piece, e.g. | 17 |
| Op-ed page feature | 18 |
| Op-ed page concerns | 19 |
| Op-ed page apology? | 19 |
| Op-ed offerings | 15 |
| Op-ed offering | 14 |
| Op-ed column, e.g. | 18 |
| Op-ed artist Pat | 16 |
| Op-Ed article | 13 |
| Op-artist Bridget | 17 |
| Op-art design | 13 |
| Op, so to speak | 15 |
| Op or pop follower | 18 |
| Op artist Bridget | 17 |
| Op artist Albers | 16 |
| Op Art pattern | 14 |
| Op Art and Pop Art | 18 |
| Oozy tree output | 16 |
| Oozy sediment | 13 |
| Oozy roof goop | 14 |
| Oozy road material | 18 |
| Oozy mixtures | 13 |
| Oozing with smarm | 17 |
| Oozing testosterone | 19 |
| Oozing stuff | 12 |
| Oozing schmaltz | 15 |
| Oozing movie menace | 19 |
| Oozing movie alien | 18 |
| Oozing liquid | 13 |
| Oozing hubris | 13 |
| Ooze-covered | 12 |
| Ooze through cracks | 19 |
| Ooze through | 12 |
| Ooze out slowly | 15 |
| Ooze gradually | 14 |
| Oospheres, say | 14 |
| Oort cloud object | 17 |
| Ooplasm locale | 14 |
| Ooplasm containers | 18 |
| Oopak or hyson | 14 |
| Oopak is one | 12 |
| Oop's love | 14 |
| Oop's kingdom | 17 |
| Oop's homeland | 18 |
| Oop's home | 14 |
| Oop's gal | 13 |
| Oop's companion | 19 |
| Oop's abode | 15 |
| Oop of comics | 13 |
| OOO, sometimes | 14 |
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