10 letters
- trienniums16
- truncation16
- truncheons18
- ulceration16
- ultrasonic16
- unactorish17
- uncanniest17
- uncreating18
- undercoats16
- underpants17
- undomestic19
- unemphatic23
- uniformest18
- unmanliest17
- unneurotic17
- unpedantic20
- unromantic19
- unscripted19
- unstrained14
- uraninites13
- urinations13
- usurpation16
- utopianism18
- vernations16
- waitperson17