| diphthongisch | diphthongal diphthongized |
| diphtherisch | diphtherial diphtheric |
| Diphthong | diphthong |
| diptotisch | diptote |
| chthonisch | chthonic |
| diatonisch | diatonic |
| Diphthongierung | diphthongization diphthongisation |
| ophthalmisch | ophthalmic eye-related |
| Ichthyologisch | ichthyological |
| benthonisch | benthic |
| lithologisch | lithological |
| pathologisch | pathological |
| euphonisch | euphonic |
| pharyngisch | pharyngeal |
| dilatorisch | dilatory |
| photonisch | photonic |
| diachronisch | diacronic |
| diatopisch | diatopic |
| dichterisch | poetic |
| dilettantisch | amateurish dilettante |