10 letters
- rigmaroles16
- rotameters13
- rotorcraft16
- rototiller12
- rottweiler14
- stereogram15
- tachometer18
- tautomeric17
- telemetric17
- teleologic17
- teleonomic18
- teratology15
- terminator14
- tetrameric16
- tetrarchic18
- theocratic18
- timocratic19
- tocologies16
- tolerating14
- toleration12
- tolerative15
- tolerators11
- torrential12
- tragicomic21
- trailerite11
- tremolites14
- tremolitic17
- trichromat18
- tricolette14
- tricolored15
- tropologic19
- ultramicro18
- varicocele21
- variometer17
- watercolor17