| extremophil | extremophilic |
| Extremistin | extremist |
| Extremsport | extreme sport |
| thermophil | thermophile thermophilic |
| oreophil | oreophilous |
| xenophil | xenophile |
| xerophil | xerophilous |
| Extremität | appendage extremity |
| Extremste | extremity |
| Extremum | extremum |
| Extremwert | turning point extremum |
| Extrem | extreme |
| extrem | extreme |
| Extremadura | Extremadura |
| Extremismus | extremism |
| Extremist | extremist |
| Tremolit | tremolite |
| homophil | homophile |
| hellenophil | Hellenophile |
| Atrophie | atrophy |