| captious | Marked by an often ill-natured inclination to stress faults and raise objections | |
| capricious | Given to sudden and unaccountable changes of mood or behavior | |
| capitulate | Cease to resist an opponent or an unwelcome demand; surrender | |
| capacious | Having a lot of space inside; roomy | |
| canonize | To officially declare a deceased person to be a saint | |
| canny | Having or showing shrewdness and good judgment, especially in money or business matters | |
| canard | A false or unfounded rumor or story | |
| calumnious | involving or using statements falsely accusing someone of doing something wrong or illegal | |
| callous | Showing or having an insensitive and cruel disregard for others | |
| calamitous | involving calamity; catastrophic or disastrous | |