| Common canine | 13 |
| Common canine name | 18 |
| Common Cape Cod feature | 23 |
| Common car | 10 |
| Common car decal | 16 |
| Common car door fixtures, once | 30 |
| Common car feature | 18 |
| Common car sale component | 25 |
| Common car style | 16 |
| Common carbohydrate | 19 |
| Common card | 11 |
| Common card game | 16 |
| Common card-table project | 25 |
| Common career choice (with ''the'') | 51 |
| Common career choice, with "the" | 42 |
| Common carrier | 14 |
| Common carrier? | 15 |
| Common carriers | 15 |
| Common carriers: Abbr. | 22 |
| Common carry-on | 15 |
| Common carry-ons | 16 |
| Common cartoon ending | 21 |
| Common cartoon tattoo | 21 |
| Common casino locale | 20 |
| Common casserole ingredient | 27 |
| Common cat | 10 |
| Common cat food flavor | 22 |
| Common cat name | 15 |
| Common catalyst | 15 |
| Common catch off the coast of Maryland | 38 |
| Common cathedral feature | 24 |
| Common cause for blessing | 25 |
| Common cause of fainting at the sight of blood | 46 |
| Common cause of food poisoning | 30 |
| Common cause of hair loss in men | 32 |
| Common cause of postponement | 28 |
| Common caustic | 14 |
| Common cavalry emblem | 21 |
| Common caveat | 13 |
| Common caveat in crossword clues | 32 |
| Common cell | 11 |
| Common cell phone feature | 25 |
| Common cellphone feature, briefly | 33 |
| Common cereal grains | 20 |
| Common chalet shape | 19 |
| Common chamber music form that includes Beethoven's "Ghost" | 73 |
| Common chap | 11 |
| Common characteristic | 21 |
| Common charity event | 20 |
| Common charley horse site | 25 |
| Common check box on surveys | 27 |
| Common check-signer | 19 |
| Common cheese | 13 |
| Common cheesecake ingredient | 28 |
| Common chest wood | 17 |
| Common childhood ailment | 24 |
| Common childhood illness, once | 30 |
| Common childhood malady | 23 |
| Common Chili's order | 24 |
| Common choice in an exam | 24 |
| Common choir music book size | 28 |
| Common chord | 12 |
| Common chords | 13 |
| Common Christmas gift | 21 |
| Common Christmas gifts | 22 |
| Common Christmas tree | 21 |
| Common chuckwalla habitat | 25 |
| Common church figure | 20 |
| Common church name | 18 |
| Common church namesake | 22 |
| Common church or arena instrument | 33 |
| Common chutney ingredient | 25 |
| Common citizen | 14 |
| Common city name ending | 23 |
| Common city name starter | 24 |
| Common city sound | 17 |
| Common Civil War ration | 23 |
| Common classroom sight | 22 |
| Common cleaning scent | 21 |
| Common cleanser | 15 |
| Common cliché | 16 |
| Common climber | 14 |
| Common closer | 13 |
| Common closing | 14 |
| Common clown accessory | 22 |
| Common clown name | 17 |
| Common clucker | 14 |
| Common clue for "erne" | 32 |
| Common co-op rule | 17 |
| Common coastal arrivals | 23 |
| Common cocktail component | 25 |
| Common cocktail components | 26 |
| Common code | 11 |
| Common coffee break hour | 24 |
| Common coffee break hr. | 23 |
| Common coffee break time | 24 |
| Common coffee flavorer | 22 |
| Common coin: abbr. | 18 |
| Common cold | 11 |
| Common cold case reviver | 24 |