| Original host of "What's My Line?" | 48 |
| Original Ice Follies slapstick skating duo | 42 |
| Original iPod, as it's now known | 36 |
| Original Legend of Zelda platform, for short | 44 |
| Original London Bridge construction material | 44 |
| Original makers of Rubik's Cube | 35 |
| Original name for J.F.K. Airport | 32 |
| Original name of an eclectic digest of reprints | 47 |
| Original name of the JavaScript computer language | 49 |
| Original name of Whiskas cat food | 33 |
| Original name on the Sleep Train Arena | 38 |
| Original network of "Fraggle Rock" | 44 |
| Original nuclear regulatory grp. | 32 |
| Original Pink Floyd guitarist Barrett | 37 |
| Original producer of the game Mouse Trap | 40 |
| Original publisher of The Tatler | 32 |
| Original pumpable basketball shoes | 34 |
| Original source of mocha coffee beans | 37 |
| Original state of the universe, in myth | 39 |
| Original Sweeney portrayer on Broadway | 38 |
| Original title: "TheVarious Arms" | 43 |
| Original Trivial Pursuit edition | 32 |
| Original U.S.S. Enterprise helmsman | 35 |
| Originally "Ba! Ba! Black Sheep" | 42 |
| Originally "Incident at West Egg" | 43 |
| Originally "Mag's Diversions" | 43 |
| Originally "The Lost Generation" | 42 |
| Originally "The Sea-Cook" | 35 |
| Originally "The Village Virus" | 40 |
| Origination of first life on earth | 34 |
| Origination point for many fireworks | 36 |
| Originator of "The Weakest Link" | 42 |
| Originator of a popular peanut butter cup | 41 |
| Originator of Eur. Common Market | 32 |
| Originator of the formula e^ix = cos x + i sin x | 48 |
| Originator of the phlogiston theory | 35 |
| Origins of all people, partially | 32 |
| Oriole : Maryland :: __ : Hawaii | 32 |
| Oriole or Blue Jay, but not a Cardinal | 38 |
| Orioles and Blue Jays, informally | 33 |
| Orioles or Santa's reindeer, e.g. | 37 |
| Orioles' division, with "the" | 43 |
| Orioles' manager in 1970 Series win | 39 |
| Orlando's love in "As You Like It" | 48 |
| Orleans "Still the ___" | 33 |
| Orly : Paris :: Gardermoen : ___ | 32 |
| Ormandy's successor in Philadelphia | 39 |
| Ornament at the base of a column | 32 |
| Ornament for a fowl's nose piercing? | 40 |
| Ornament for Galahad's headgear | 35 |
| Ornament that may be worn with sandals | 38 |
| Ornamental African evergreen shrubs | 35 |
| Ornamental cloth behind an altar | 32 |
| Ornamental container in a flower shop | 37 |
| Ornamental figure of Japanese art | 33 |
| Ornamental flower with clustered blooms | 39 |
| Ornamental framework of wood laths | 34 |
| Ornamental headband worn as a badge of royalty | 46 |
| Ornamental headband worn by royalty | 35 |
| Ornamental objects of no great value | 36 |
| Ornamental plant with fernlike foliage | 38 |
| Ornamental shrub of the rose family | 35 |
| Ornamental shrub with roselike flowers | 38 |
| Ornamental shrub with yellow flowers | 36 |
| Ornamental stone made of colored quartz | 39 |
| Ornamental three-dimensional pattern | 36 |
| Ornamental tree of the laurel family | 36 |
| Ornamental, but poisonous, shrub | 32 |
| Ornamentation with curved indentations | 38 |
| Ornamented 18th-century hairdress | 33 |
| Ornaments sometimes hidden by socks | 35 |
| Ornaments that resemble diamonds | 32 |
| Ornate but temporary winter structure | 37 |
| Ornate clone of designer Chanel? | 32 |
| Ornate holder for pins and needles | 34 |
| Ornate leaf, or a design patterned after it | 43 |
| Ornate, like a peacock's tail | 33 |
| Ornery Warner Bros. cartoon character | 37 |
| Ornithologists' bird-tagging outing? | 40 |
| Ornithologists' major bird-tagging event? | 45 |
| Orozco's "another" | 32 |
| Orphan Annie's Oriental friend | 34 |
| Orphan girl in Byron's "Don Juan" | 47 |
| Orphan in a "choppy" rhyme | 36 |
| Orphan's "Arf!" utterer | 37 |
| Orphan's kin, in typesetting | 32 |
| Orphanage started by an Oscar-winning actress? | 46 |
| Orphaned author raised by the Allans | 36 |
| Orson Scott Card's "___ Game" | 43 |
| Orson Scott Card's "____ Game" | 44 |
| Orson Welles called him "The Great One" | 49 |
| Orson Welles role in "The Third Man" | 46 |
| Orson Welles's Wisconsin birthplace | 39 |
| Orson's planet in 70's TV | 33 |
| Orson, e.g., in a '70s-'80s sitcom | 42 |
| Orthodontic device for separating teeth | 39 |
| Orthodontist's degree: Abbr. | 32 |
| Orthodontist's diagnosis, sometimes | 39 |
| Orthography experts' newspaper? | 35 |
| Orthopedist's favorite film (2009) | 38 |