13 letters
- scenographies24
- schistosities18
- schizophrenes33
- scrappinesses23
- scrawninesses21
- scruffinesses24
- seasicknesses21
- seasonalities15
- secretagogues21
- sectarianizes26
- seismometries19
- selectivities21
- selfishnesses20
- semasiologies19
- semiaridities17
- semiliterates17
- semimonthlies23
- semiparasites19
- sensibilities18
- sensitivities18
- serendipities18
- seriousnesses15
- serodiagnoses17
- serriednesses15
- servilenesses19
- sexlessnesses22
- sextuplicates28
- shadowinesses20
- shallownesses21
- shapelinesses20
- shepherdesses21
- sickishnesses23
- sightlinesses19
- significances26
- silverberries21
- silverinesses19
- silvicultures24
- sincerenesses18
- singularities18
- sinlessnesses16
- sinuousnesses17
- siphonophores24
- siphonosteles20
- sizablenesses27
- sketchinesses23
- skulduggeries25
- slavishnesses21
- slendernesses17
- slouchinesses21
- sociabilities20
- solvabilities22
- somatopleures21
- somnambulates25
- songfulnesses22
- sophisticates21
- sorbabilities20
- soteriologies16
- sottishnesses16
- soulfulnesses21
- sovereignties20
- speakerphones26
- specialnesses21
- specificities25
- spectroscopes25
- specularities21
- spermatocytes24
- spiritualizes27
- spiritualties18
- spirochetoses21
- splashinesses20
- splenectomies24
- spondylitises21
- spontaneities18
- springinesses20
- squalidnesses26
- squashinesses26
- squirearchies28
- squishinesses26
- staggerbushes23
- starchinesses19
- statelinesses15
- staunchnesses21
- steeplebushes23
- steeplechases22
- stegosauruses17
- stenographies21
- stephanotises19
- stereophonies19
- stereoscopies19
- stichomythies25
- stiltednesses16
- stipendiaries18
- straightedges20
- strangenesses17
- stratocracies19
- stratospheres18
- streakinesses18
- strenuosities15
- stringcourses20
- stringinesses17
- stromatolites17
- strontianites15
- studiednesses17
- stuntednesses17
- stylishnesses19
- stylographies23
- suasivenesses19
- subacidnesses22
- subassemblies24
- subcategories22
- subclassifies24
- subcommittees26
- subcontraries21
- subdebutantes23
- subindustries20
- subinfeudates23
- subjectivises33
- subjectivizes42
- sublimenesses22
- subliteracies21
- subsatellites19
- subserviences25
- substantiates18
- substructures22
- subtilenesses19
- subtreasuries18
- sufficiencies27
- suitabilities18
- sulfadiazines29
- summabilities24
- superagencies23
- superannuates20
- superathletes20
- superchurches28
- superelevates22
- superfamilies24
- superfluities22
- superheroines20
- superiorities17
- superluxuries27
- superovulates23
- suppositories20
- supremenesses21
- surgeonfishes22
- surveillances24
- swarthinesses19
- swinishnesses20
- switchgrasses23
- syllabicities23
- sylvicultures26
- synchromeshes26
- synchroscopes27
- taciturnities18
- tactfulnesses22
- tangibilities20
- tearfulnesses19
- technicalizes32
- technobabbles29
- technocracies25
- technologizes31
- tediousnesses16
- teemingnesses20
- telegrapheses21
- teleutospores18
- temporalities20
- tenablenesses19
- tensiometries17
- tenuousnesses17
- teratogeneses16
- tergiversates19
- terminologies20
- testabilities17
- testosterones14
- tetracyclines23
- tetrahedrites16
- tetraploidies18
- tetrapyrroles19
- thanatologies19
- thaumaturgies22
- theophyllines25
- thermocouples26
- thermometries21
- thermospheres23
- thioridazines26
- thirstinesses16
- thoracotomies21
- thoroughfares23
- threadinesses17
- thriftinesses19
- throatinesses16
- throatlatches21
- thunderstones19
- thymectomizes35
- thyroiditises18
- timberdoodles22
- tonsillitises16
- toplessnesses18
- torticollises18
- totipotencies20
- toxoplasmoses27