10 letters
- stonechats16
- storeships15
- straitness11
- strathspey17
- striations11
- strictness14
- strictures14
- suctorians15
- sunporches20
- supersonic18
- superstars14
- supertonic18
- supinators15
- suretyship18
- suspensory17
- suspicions18
- sustainers12
- sycophants21
- syncarpies19
- syncarpous20
- syncopates19
- syncretist16
- synthesist15
- synthetics18
- tanistries11
- tessituras11
- therapists15
- thorianite13
- thyratrons15
- thyristors14
- touchiness17
- tracheitis15
- traitoress10
- transcript17
- transistor11
- transitory13
- transpires14
- transports14
- transposes14
- transships16
- trashiness13
- triarchies15
- trichiases15
- trichinous17
- tricotines14
- trisection14
- trisectors13
- tristearin11
- trochanter16
- truantries12
- trustiness12
- tutorships16
- tyrosinase13
- uintahites14
- unactorish17
- unartistic15
- unchastity19
- unstitches17
- urethritis13
- urtication15