| hyperthymestisches Syndrom | hyperthymesia |
| hyperkinetisches Syndrom | hyperkinetic disorder |
| hypergeometrische Funktion | hypergeometric function |
| hyperkinetische Störung | hyperkinetic disorder |
| pyroklastischer Strom | pyroclastic flow |
| hämolytisch-urämisches Syndrom | haemolytic-uraemic syndrome hemolytic-uraemic syndrome |
| hypothetischer Imperativ | hypothetical imperative |
| Messie-Syndrom | hoarding |
| arithmetisches Mittel | arithmetic mean |
| chinesisches Fondue | hot pot |
| elektrischer Strom | electric current |
| kartesisches Produkt | Cartesian product |
| Tyrrhenisches Meer | Tyrrhenian Sea |
| etymologisches Spektrum | etymological spectrum |
| Hochstapler-Syndrom | impostor syndrome |
| hyperkinetisch | hyperkinetic |
| Hypothekenschuldner | mortgagor |
| hypothetisch | hypothetical hypothetic |
| Persisches Reich | Persian Empire |
| Asperger-Syndrom | Asperger Asperger's syndrome |