| Unixzeit | Unix time |
| Unzeit | not at right time |
| Unittest | unit test |
| Endzeit | end times |
| Eiszeit | ice age |
| Neuzeit | modern age modern era |
| Teilzeit | part-time |
| Uhrzeit | time time of day |
| Urzeit | primeval times |
| unweit | a short distance from close to near not far from |
| Launigkeit | petulance |
| Unikat | one of a kind |
| Unionist | unionist |
| Unix | Unix |
| unieren | unify |
| unisex | unisex |
| Nixe | mermaid |
| Brunftzeit | rutting season |
| Brunstzeit | rutting season |
| Gleitzeit | flexitime |