| Urethan | urethan urethane |
| Urethra | urethra |
| Ethan | ethane |
| Methan | methane |
| Ureter | ureter |
| Erethie | erethism |
| Greta | Maggie |
| Gretchen | Maggie |
| Kreta | Crete |
| Kretin | cretin |
| Retten | rescue |
| retten | save rescue escape recover |
| fretten | chafe gall exert oneself fret make an effort take pains try hard |
| treten | step tread kick |
| Ethen | ethene ethylene |
| Ethin | ethyne |
| Äthan | ethane |
| Lanthan | lanthanum lanthanium |
| Nathan | Nathan |
| Than | Thane |