| Prefix with bus and present | 27 |
| Prefix with bus or potent | 25 |
| Prefix with bus or present | 26 |
| Prefix with bus or science | 26 |
| Prefix with bus or series | 25 |
| Prefix with business | 20 |
| Prefix with business and chemical | 33 |
| Prefix with butane | 18 |
| Prefix with byte | 16 |
| Prefix with byte or buck | 24 |
| Prefix with byte or bucks | 25 |
| Prefix with byte or watt | 24 |
| Prefix with bytes | 17 |
| Prefix with bytes or bucks | 26 |
| Prefix with cab | 15 |
| Prefix with cab or cure | 23 |
| Prefix with cache | 17 |
| Prefix with caching | 19 |
| Prefix with caching or graphic | 30 |
| Prefix with caddie | 18 |
| Prefix with calculate | 21 |
| Prefix with call or cop | 23 |
| Prefix with calyx or thalamus | 29 |
| Prefix with cameral | 19 |
| Prefix with Canadian or American | 32 |
| Prefix with car | 15 |
| Prefix with car or law | 22 |
| Prefix with car or tour | 23 |
| Prefix with car or warrior | 26 |
| Prefix with carbon | 18 |
| Prefix with cardiography | 24 |
| Prefix with cardium | 19 |
| Prefix with carp or biology | 27 |
| Prefix with carpal | 18 |
| Prefix with carpal or "tarsal" or "physical" | 64 |
| Prefix with carpal or tarsal | 28 |
| Prefix with cast | 16 |
| Prefix with cast or type | 24 |
| Prefix with cast or vise | 24 |
| Prefix with catastrophe | 23 |
| Prefix with Catholic or classic | 31 |
| Prefix with Catholic or Confucian | 33 |
| Prefix with cede | 16 |
| Prefix with cede or change | 26 |
| Prefix with cede or date | 24 |
| Prefix with cede or flex | 24 |
| Prefix with cellular | 20 |
| Prefix with cellular or body | 28 |
| Prefix with centenary | 21 |
| Prefix with centennial | 22 |
| Prefix with center | 18 |
| Prefix with center or cycle | 27 |
| Prefix with center or dermal | 28 |
| Prefix with center or dermis | 28 |
| Prefix with center or gram | 26 |
| Prefix with center or lady? | 27 |
| Prefix with center or pen | 25 |
| Prefix with central | 19 |
| Prefix with centric | 19 |
| Prefix with centric or biology | 30 |
| Prefix with centricity | 22 |
| Prefix with centrism | 20 |
| Prefix with centrism or graphic | 31 |
| Prefix with century | 19 |
| Prefix with century names | 25 |
| Prefix with chamber | 19 |
| Prefix with chamber or bellum | 29 |
| Prefix with chamber or chapel | 29 |
| Prefix with chamber or room | 27 |
| Prefix with chance | 18 |
| Prefix with chance and adventure | 32 |
| Prefix with chance or adventure | 31 |
| Prefix with chance or hap | 25 |
| Prefix with change | 18 |
| Prefix with change or act | 25 |
| Prefix with change or state | 27 |
| Prefix with chapel | 18 |
| Prefix with charge | 18 |
| Prefix with chemical | 20 |
| Prefix with chemistry | 21 |
| Prefix with China | 17 |
| Prefix with Chinese | 19 |
| Prefix with Chinese or European | 31 |
| Prefix with chloride | 20 |
| Prefix with chord | 17 |
| Prefix with chord or color | 26 |
| Prefix with chord or corn | 25 |
| Prefix with chord or meter | 26 |
| Prefix with Christ | 18 |
| Prefix with christ or pope | 26 |
| Prefix with chronometry | 23 |
| Prefix with chute | 17 |
| Prefix with chute or graph | 26 |
| Prefix with chute or troop | 26 |
| Prefix with circle | 18 |
| Prefix with circle or colon | 27 |
| Prefix with Cities | 18 |
| Prefix with city | 16 |
| Prefix with classic | 19 |
| Prefix with classic or Gothic | 29 |