11 letters
- saturnalias14
- scarlatinas16
- scissortail15
- sensational14
- separations15
- separatists14
- shinsplints19
- simulations17
- situational14
- solicitants16
- solidarists13
- spallations17
- spiculation20
- spiritualty18
- spoliations16
- sporulating19
- sporulation17
- springtails18
- stagnations15
- standpoints17
- starvations16
- staurolites13
- staurolitic16
- stimulation17
- stimulators16
- stipulating19
- stipulation17
- stipulators16
- stipulatory18
- subnational18
- subrational17
- substantial17
- substations16
- supernatant17
- supernation17
- supinations17
- suspiration16
- tabulations17
- tantalising16
- traditional14
- transaction16
- transalpine17
- transfusion17
- transistors12
- transitions13
- translating16
- translation14
- translators13
- transplants17
- transposing18
- transposons16
- trepanation16
- tribulation17
- truncations17
- ultrasonics17
- unimportant20
- uniparental18
- unpatriotic19
- unresistant14
- unspiritual18
- unstartling17
- urtications16
- usurpations17
- utilitarian14
- utopianisms19
- variational17
- voluntarist18