9 letters
- tricotine13
- triennial12
- triennium15
- trilinear11
- trilobite13
- trinketer14
- triturate10
- troilites10
- trotlines11
- troutiest10
- tuitional12
- tunnelers13
- turneries11
- turnstile12
- turnstone12
- underline14
- undertone13
- unfertile15
- unilinear13
- unreeling15
- unrooting14
- unsterile12
- unwritten15
- uraninite12
- ureotelic14
- urination12
- volunteer16
- winterier13