| offizinell | officinal |
| offiziell | official officially |
| inoffiziell | informal |
| Offizier | officer commissioned officer mate piece |
| originell | original inventive fancy |
| Offizierin | officer |
| Koeffizient | coefficient |
| offiziös | white lie |
| offline | offline |
| Effizienz | efficiency |
| effizient | efficient |
| kriminell | criminal |
| offene | open source |
| halboffiziell | semi-official |
| Öffner | opener |
| öffnen | open |
| Suffizienz | sufficiency |
| affigiert | advertised placarded |
| affizieren | affect |
| diffizil | delicate difficult tricky |