11 letters
- semitropics20
- smithereens17
- solemnities16
- southerlies15
- southerners15
- spherometer19
- spherulites18
- spherulitic21
- spirochetes19
- spirometers17
- spirometric20
- stereoscope17
- supercenter19
- supercities18
- superelites16
- superheroes17
- superliners17
- supermicros21
- superschool21
- supersecret18
- supersmooth20
- supertonics19
- telecourses16
- teleonomies16
- telephoners18
- telephonies18
- teliospores15
- terrepleins16
- terricolous16
- thermionics20
- thermocline21
- thermopiles20
- thermoscope22
- tocopherols20
- trichinoses17
- unseemliest17
- upholsterer18
- ureotelisms16
- uricotelism19
- urinometers16