| Text | Length |
| Open | 4 |
| Opel or Cord | 12 |
| Opel or Citroën | 18 |
| Opel model | 10 |
| Opel car model | 14 |
| OPEC-sold intangible? | 21 |
| OPEC, notably | 13 |
| OPEC, NATO, etc. | 16 |
| OPEC, for one | 13 |
| OPEC, e.g. | 10 |
| OPEC's largest customer | 27 |
| OPEC's headquarters | 23 |
| OPEC's export | 17 |
| OPEC's concern | 18 |
| OPEC's biggest customer | 27 |
| OPEC's "gold" | 27 |
| OPEC vessel | 11 |
| OPEC V.I.P. | 11 |
| OPEC units: abbr. | 17 |
| OPEC units | 10 |
| OPEC unit: Abbr. | 16 |
| OPEC unit of measure | 20 |
| OPEC unit | 9 |
| OPEC supply | 11 |
| OPEC summit attendee | 20 |
| OPEC subject | 12 |
| OPEC stuff | 10 |
| OPEC ship | 9 |
| OPEC quantities | 15 |
| OPEC production cutback? | 24 |
| OPEC product | 12 |
| OPEC participant | 16 |
| OPEC output | 11 |
| OPEC nation currency | 20 |
| OPEC nation | 11 |
| OPEC moneymaker | 15 |
| OPEC members | 12 |
| OPEC member: Abbr. | 18 |
| OPEC member, for short | 22 |
| OPEC member, briefly | 20 |
| OPEC member since 1967 | 22 |
| OPEC member | 11 |
| OPEC mem. | 9 |
| OPEC meeting VIP | 16 |
| OPEC meeting attendee | 21 |
| OPEC measures | 13 |
| OPEC measure | 12 |
| OPEC lands | 10 |
| OPEC land | 9 |
| OPEC is one: Abbr. | 18 |
| OPEC is one | 11 |
| OPEC investigation? | 19 |
| OPEC holding | 12 |
| OPEC fuel | 9 |
| OPEC founding member | 20 |
| OPEC foolishness in a Central Park mix-up? | 42 |
| OPEC export | 11 |
| OPEC dignitary, maybe | 21 |
| OPEC customer | 13 |
| OPEC country | 12 |
| OPEC concern | 12 |
| OPEC commodity | 14 |
| OPEC co-founder | 15 |
| OPEC charter member | 19 |
| OPEC amts. | 10 |
| OPEC amounts, briefly | 21 |
| OPEC for example | 17 |
| OPEC | 4 |
| Opéra-___ | 12 |
| Opéra division | 17 |
| Opaquely white | 14 |
| Opaque-glazed earthenware pieces | 32 |
| Opaque, in a way | 16 |
| Opaque watercolors | 18 |
| Opaque watercolor technique | 27 |
| Opaque vase material | 20 |
| Opaque painting style | 21 |
| Opaque material used in vases, e.g. | 35 |
| Opaque gemstone | 15 |
| Opaque gems | 11 |
| Opaque gem | 10 |
| Opaque eye layer | 16 |
| Opaque drinking vessel | 22 |
| Opaque clouds, to meteorologists | 32 |
| Opaque campaign supporters, briefly | 35 |
| Opaque barite | 13 |
| Opaque | 6 |
| Opals and rubies | 16 |
| Opals and emeralds | 18 |
| Opalescent ocean find | 21 |
| Opalescent gems | 15 |
| Opalescent gem | 14 |
| Opalescent | 10 |
| Opal, essentially | 17 |
| Opal's mo. | 14 |
| Opal suffix | 11 |
| Opal or topaz | 13 |
| Opal or petal suffix | 20 |
| Opal or onyx | 12 |
| Opal or garnet | 14 |
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