| Calcit | calcite |
| Calcitonin | calcitonin |
| Calcitriol | calcitriol |
| Calcium | calcium |
| Calla | arum lily |
| Callisto | Callisto |
| Calumet | peace pipe |
| Calyx | calyx |
| Call | call call option |
| Caló | Caló |
| Analcim | analcime analcite |
| Kamacit | kamacite |
| Calvities | baldness |
| Decalin | decalin |
| Caldera | caldera |
| Calgary | Calgary |
| Callboy | callboy |
| Callgirl | call girl callgirl |
| Calvinist | Calvinist |
| Calypso | calypso |