| Co-creator of Sir Roger de Coverley | 35 |
| Co-creator of Spider-Man | 24 |
| Co-creator of the ambient music app Scape | 41 |
| Co-creator of the Fantastic Four | 32 |
| Co-creator of the Hulk | 22 |
| Co-creator of the Oblique Strategies playing cards | 50 |
| Co-creator of the Reitwagen, the first internal-combustion motorcycle | 69 |
| Co-creator of the thumb index? | 30 |
| Co-creator of Yogi and Boo Boo | 30 |
| Co-creator of Yogi, Quick Draw, et al. | 38 |
| Co-creator of" Lost" | 30 |
| Co-defendant with Vanzetti | 26 |
| Co-defendant? | 13 |
| Co-designee as Time's 1993 Man of the Year | 46 |
| Co-discoverer of a genetic structure | 36 |
| Co-discoverer of cosmic rays Victor | 35 |
| Co-discoverer of insulin | 24 |
| Co-discoverers of DNA | 21 |
| Co-ed inst. overlooking the Hudson | 34 |
| Co-ed quarters | 14 |
| Co-explorer of 1804 | 19 |
| Co-feeder of the Humber | 23 |
| Co-fighter | 10 |
| Co-firing technique used to reduce pollution from electrical power plants | 73 |
| Co-founder of a California winery | 33 |
| Co-founder of A&M Records with Jerry Moss | 45 |
| Co-founder of Air Greenland | 27 |
| Co-founder of Beats Electronics | 31 |
| Co-founder of Current TV | 24 |
| Co-founder of Dadaism | 21 |
| Co-founder of Death Row Records | 31 |
| Co-founder of Duxbury, Mass. | 28 |
| Co-founder of Jay-Z's Roc-A-Fella Records | 45 |
| Co-founder of MGM | 17 |
| Co-founder of Ms. | 17 |
| Co-founder of Rome | 18 |
| Co-founder of Shady Records | 27 |
| Co-founder of Standard Oil and developer of Florida's east coast | 68 |
| Co-founder of the 2007 Live Earth concerts | 42 |
| Co-founder of the Actors Studio | 31 |
| Co-founder of the avant-garde Blue Four | 39 |
| Co-founder of the Blue Four movement | 36 |
| Co-founder of the N.A.A.C.P. | 28 |
| Co-founder of the Non-Aligned Movement, 1961 | 44 |
| Co-founder of the Nonaligned Movement | 37 |
| Co-founder of the political movement "Bagism" | 55 |
| Co-founder of the Psychological Wednesday Society | 49 |
| Co-founder of the Smashing Pumpkins with Corgan | 47 |
| Co-founder of Time magazine | 27 |
| Co-founding SkyTeam airline | 27 |
| Co-hero at Ticonderoga: 1775 | 28 |
| Co-host Kelly | 13 |
| Co-host of Meredith, Ann, and Al | 32 |
| Co-host of morning TV | 21 |
| Co-host with Kelly | 18 |
| Co-host with Philbin | 20 |
| Co-host with Richard Roeper | 27 |
| Co-inventor of cordite | 22 |
| Co-inventor of the rerun | 24 |
| Co-landlord of classic TV | 25 |
| Co-Nobelist Arafat | 18 |
| Co-Nobelist for Peace: 1907 | 27 |
| Co-Nobelist for Peace: 1925 | 27 |
| Co-Nobelist for Peace: 1978 | 27 |
| Co-Nobelist in Chemistry: 1946 | 30 |
| Co-Nobelist in Chemistry: 1950 | 30 |
| Co-Nobelist in Literature: 1904 | 31 |
| Co-Nobelist in Literature: 1966 | 31 |
| Co-Nobelist in Medicine: 1947 | 29 |
| Co-Nobelist in Medicine: 1954 | 29 |
| Co-Nobelist in Medicine: 1969 | 29 |
| Co-Nobelist in Medicine: 1970 | 29 |
| Co-Nobelist in Medicine: 1977 | 29 |
| Co-Nobelist Metchnikoff: 1908 | 29 |
| Co-Nobelist of 1903 | 19 |
| Co-Nobelist of Rabin and Peres | 30 |
| Co-Nobelist of Yitzhak and Shimon | 33 |
| Co-Nobelist with Begin | 22 |
| Co-Nobelist with Begin in 1978 | 30 |
| Co-Nobelist with Menachem | 25 |
| Co-Nobelist: 1978 | 17 |
| Co-nominee | 10 |
| Co-op alternative | 17 |
| Co-op contract | 14 |
| Co-op division | 14 |
| Co-op employees | 15 |
| Co-op kin | 9 |
| Co-op unit: Abbr. | 17 |
| Co-op's cousin | 18 |
| Co-op's plot | 16 |
| Co-ops, e.g. | 12 |
| Co-ops: Abbr. | 13 |
| Co-opt | 6 |
| Co-organizer of the Montgomery bus boycott, 1955 | 48 |
| Co-originator of the one-step | 29 |
| Co-owned house on sand? | 23 |
| Co-owner and captain of the Pequod in "Moby-Dick" | 59 |
| Co-owner of Asta | 16 |
| Co-owner of OWN | 15 |
| Co-owner of Paddy's Pub in "It's Always Sunny in Philadelphia" | 80 |