9 letters
- triennial12
- triennium15
- trifolium17
- trilinear11
- trillions12
- trilliums15
- trilobate13
- trilobite13
- trinomial14
- troubling17
- tuitional12
- tularemia14
- tularemic17
- tumorlike18
- turbinals15
- turbinate14
- turmoiled15
- turntable15
- ultrafine15
- ululation14
- umbellate18
- umbilical21
- umbrellas18
- unamiable18
- unifiable18
- unilineal14
- unilinear13
- unitarily14
- unlikable20
- unlimbers18
- unlimited16
- unlivable20
- unlovable20
- unmanlier16
- unmixable25
- unmovable22
- unreality14
- unridable16
- unstabler15
- untamable18
- uraninite12
- urbanites14
- uredinial13
- urination12
- urinemias14
- vermilion18
- vibratile17
- vibration17
- womanlier17