| Collapsible canopies | 20 |
| Collapsible beds | 16 |
| Collapsible bed | 15 |
| Collapses, with "over" | 32 |
| Collapses, with "in" | 30 |
| Collapses | 9 |
| Collapsed, with "in" | 30 |
| Collapsed under pressure | 24 |
| Collapsed suddenly, as the stock market | 39 |
| Collapsed company of 2001 | 25 |
| Collapsed company chronicled in the 2005 documentary subtitled "The Smartest Guys in the Room" | 104 |
| Collapsed | 9 |
| Collapse, with "over" | 31 |
| Collapse, with "out" | 30 |
| Collapse, with "in" | 29 |
| Collapse, in a way | 18 |
| Collapse under pressure | 23 |
| Collapse inward | 15 |
| Collapse in the clutch | 22 |
| Collapse in a weary heap | 24 |
| Collapse from exhaustion, in slang | 34 |
| Collapse from exhaustion | 24 |
| Collapse from excitement, in Yiddish | 36 |
| Collapse | 8 |
| Collapsable bed | 15 |
| Collander | 9 |
| Collagist's tool | 20 |
| Collagist's need | 20 |
| Collagist Max | 13 |
| Collagen target | 15 |
| Collagen product | 16 |
| Collagen injection site | 23 |
| Collagen cousin | 15 |
| Collage-making need | 19 |
| Collage-making material | 23 |
| Collage-maker's need | 24 |
| Collage, e.g. | 13 |
| Collage specialist | 18 |
| Collage of songs | 16 |
| Collage of potpourri bits? | 26 |
| Collage materials | 17 |
| Collage material | 16 |
| Collage introducer | 18 |
| Collage creator's need | 26 |
| Collage application | 19 |
| Collage | 7 |
| Collaboratory obstacle | 22 |
| Collaborator with Twain | 23 |
| Collaborator with Sinatra and Katy Perry | 40 |
| Collaborator with Paul Simon on his 2006 album "Surprise" | 67 |
| Collaborator with Marx | 22 |
| Collaborator with Kaufman | 25 |
| Collaborator with Engels | 24 |
| Collaborator with Duchamp | 25 |
| Collaborator with Disney on the film "Destino" | 56 |
| Collaborator with Claude Debussy | 32 |
| Collaborator with a Count and a Duke | 36 |
| Collaborator of Marx | 20 |
| Collaborator of Crosby, Stills and Young | 40 |
| Collaborator of Byrne and Bowie | 31 |
| Collaborator of a sort | 22 |
| Collaborator | 12 |
| Collaboratively edited site | 27 |
| Collaborative work | 18 |
| Collaborative websites | 22 |
| Collaborative website for Lady Gaga and RuPaul? | 47 |
| Collaborative website | 21 |
| Collaborative Web site | 22 |
| Collaborative Web project | 25 |
| Collaborative Web document | 26 |
| Collaborative software, from the Hawaiian for "fast" | 62 |
| Collaborative Internet project | 30 |
| Collaborative instructional website | 35 |
| Collaborative group | 19 |
| Collaborative educ. group | 25 |
| Collaborative coalition | 23 |
| Collaborations | 14 |
| Collaboration, e.g. | 19 |
| Collaboration's intended bonus | 34 |
| Collaboration | 13 |
| Collaborating group | 19 |
| Collaborating (with) | 20 |
| Collaborating (with "up") | 35 |
| Collaborated | 12 |
| Collaborate sneakily | 20 |
| Collaborate a second time | 25 |
| Coll.transcript no. | 19 |
| Coll., e.g. | 11 |
| Coll.'s big sister | 22 |
| Coll. World Series sponsor | 26 |
| Coll. with a husky named Jonathan XII | 37 |
| Coll. with a husky mascot | 25 |
| Coll. with a Foggy Bottom campus | 32 |
| Coll. with a Happy Valley campus | 33 |
| Coll. V.I.P. | 12 |
| Coll. units | 11 |
| Coll. transcript stat | 21 |
| Coll. transcript number | 23 |
| Coll. transcript no. | 20 |
| Coll. transcript figure | 23 |