12 letters
- standardbred19
- standardised16
- standardises15
- standardized25
- standardizes24
- standardless16
- standpatters17
- standpattism20
- stapedectomy24
- staphylinids22
- starboarding19
- startlements17
- stationeries13
- statistician16
- statuesquely26
- stereotactic18
- sternocostal17
- sternutation15
- sternutators14
- stocktakings26
- straightaway21
- subantarctic23
- subcutaneous22
- subdebutante22
- subsecretary21
- substantials18
- substantiate17
- substantival22
- substantives21
- subtotalling21
- suitableness18
- supernatants18
- superstardom20
- superstation17
- supertankers21
- supplemental25
- supraorbital20
- supravitally24
- surmountable22
- sustentation15
- sustentative18
- swallowtails21
- symmetallism25
- tabernacling23
- tabernacular21
- tachycardias23
- tactlessness17
- tagliatelles17
- talebearings19
- tangentially20
- tangibleness20
- taphonomists21
- tarradiddles16
- taskmistress19
- tastefulness18
- tautological20
- tautomerisms19
- tawdrinesses17
- taxidermists23
- teetotalisms16
- teetotalists13
- teetotallers14
- teetotalling17
- testamentary18
- tetanization23
- thermostable21
- thermostated18
- thermostatic20
- thermotactic23
- thumbtacking31
- ticktacktoes26
- titaniferous17
- tolbutamides21
- totalisators13
- totalitarian14
- totalizators22
- tractability21
- transductant19
- translatable18
- transmittals17
- transmontane18
- transmutable21
- treatability18
- trustability19
- ultradistant16
- ultramontane19
- unacceptable27
- unacceptably29
- unattainable19
- uncharitable23
- uncharitably25
- understaffed22
- understating18
- undertakings22
- undetectable22
- undisputable23
- unhesitating19
- unimportance24
- unitarianism18
- unmarketable25
- unmistakable25
- unmistakably27
- unobtainable22
- unpatentable22
- unprofitable24
- unprofitably26
- unrepeatable21
- unstableness19
- urinogenital18
- utilitarians15
- vegetational20
- vegetatively25
- visitatorial17
- vitalization27
- voluntarisms22
- voluntarists19
- voluntaryism24
- voluntaryist21
- withstanding22
- workstations20