| Messie-Syndrom | hoarding |
| Aase-Syndrom | Aase syndrome |
| Undine-Syndrom | Ondine's curse |
| Möbius-Syndrom | Moebius syndrome |
| China-Syndrom | China syndrome |
| Down-Syndrom | Down syndrome |
| Impostor-Syndrom | impostor syndrome |
| Aarskog-Syndrom | Aarskog’s syndrome |
| Massenstrom | mass flow |
| Messerhändler | knifer |
| Messestand | booth |
| Messidor | Messidor |
| Messinium | Messinian |
| messerscharf | razor-sharp |
| Messdiener | altar boy altar server altar girl ministrant |
| Messdienerin | altar girl |
| Messerwunde | knife wound |
| Messgewand | chasuble |
| Tourette-Syndrom | Tourette syndrome |
| Locked-in-Syndrom | locked-in syndrome |