10 letters
- spermaceti19
- spermatial17
- spermatium20
- sperrylite16
- sphalerite16
- spheroidal17
- spherulite17
- spirochete18
- spirometer16
- spirometry18
- splotchier19
- sportively20
- stealthier13
- stepfamily22
- stepmother18
- streamline15
- streetlamp17
- strippable20
- suboptimal21
- subprimate20
- symbolizer28
- symmetries18
- symmetrize27
- sympathies20
- sympathise20
- sympathize29
- sympatries18
- telegraphs18
- telegraphy20
- teliospore14
- telophases16
- temperable20
- temporally20
- temporised17
- temporises16
- temporizes25
- terminable18
- terminably20
- terpineols15
- terpolymer19
- thermalize25
- thermopile19
- thimerosal16
- timberhead19
- timetables17
- tiresomely16
- tracheoles16
- trampoline18
- trehaloses13
- trembliest17
- tremolites14
- treponemal18
- treponemas17
- turophiles17
- upholstery19
- ureotelism15
- xerophytes24
- yeomanries16
- zealotries20