| Acronym | Definition |
|---|
| NKCA➣National Knife Collectors Association (est. 1972; Chattanooga, TN) |
| NKCA➣Natural Killer Cell Activity (neuroscience) |
| NKCA➣National Kidney Cancer Association |
| NKCA➣National Kitchen Cabinet Association (Falls Church, VA) |
| NKCA➣New Kingston Citizens' Association (Jamaica) |