| Apologet | apologist |
| Apologetik | apologia apology |
| apologetisch | apologetic |
| Apologie | apology apologia |
| Apokopat | jussive |
| apoptogen | apoptogenic |
| Apokope | apocope |
| -ologe | -ologist |
| Aerologie | aerology |
| Ufologe | ufologist |
| Biologe | biologist |
| Geologe | geologist |
| Urologe | urologist |
| Zoologe | zoologist |
| Ökologe | ecologist |
| Önologe | enologist |
| Apoll | Apollo |
| Apollo | Apollo |
| Apollon | Apollo |
| Apollonia | Apollonia |