12 letters
- semiannually22
- semimetallic23
- sentinelling19
- septennially21
- sepulchrally26
- sequentially27
- seraphically24
- sexdecillion26
- shellackings26
- shellcracker26
- shellfishery23
- shellshocked26
- shrillnesses17
- sillimanites18
- simoniacally23
- simplicially26
- sinusoidally19
- skillessness19
- skillfulness24
- skullduggery27
- slumgullions23
- smallclothes23
- smallholders21
- smallholding24
- snollygoster19
- soullessness16
- specifically28
- speedballing24
- spellbinders22
- spellbinding25
- spheroidally22
- spitefullest21
- sporadically23
- sprightfully27
- squirrelling27
- stallholders18
- steamrollers17
- steamrolling20
- stonewallers18
- stonewalling21
- storytellers16
- storytelling19
- structurally21
- subcentrally24
- subglacially26
- subliminally25
- submaxillary30
- subsatellite18
- subsonically24
- subtotalling21
- subumbrellas25
- successfully27
- sullennesses17
- supersellers18
- supravitally24
- surveillance23
- surveillants20
- swallowtails21
- syllabically26
- syllabicated23
- syllabicates22
- syllabifying27
- symbolically28
- symmetallism25
- synaptically25
- syndetically23
- synergically24
- synoptically25
- systemically24
- tagliatelles17
- tangentially20
- tectonically23
- teetotallers14
- teetotalling17
- tellurometer18
- terrifically22
- tessellating17
- tessellation15
- tetragonally19
- thallophytes23
- thallophytic26
- thankfullest25
- theatrically21
- theistically21
- thematically24
- theophylline24
- thoracically24
- thoughtfully27
- tinctorially20
- titillations15
- torrentially17
- tourbillions19
- tranquillest25
- tranquillity27
- tranquillize34
- tredecillion19
- trellisworks21
- trilingually21
- trisyllables20
- trolleybuses20
- trophallaxes26
- trophallaxis26
- turbellarian19
- tyrannically23
- unalleviated21
- unchallenged25
- uncompelling28
- uncontrolled21
- uncritically24
- undecillions21
- underbellies20
- underselling20
- uneventfully27
- unfaithfully27
- unfruitfully26
- ungracefully27
- ungratefully24
- unicamerally24
- unilaterally19
- unillusioned19
- unironically22
- unkennelling25
- unmercifully28
- unofficially27
- unparalleled21
- unskillfully28
- untruthfully25
- vacillations22
- valpolicella26
- vaudevillian25
- verticillate21
- vexillologic31
- vigintillion22
- villainesses19
- villainously23
- violoncellos23
- vocationally24
- volcanically28
- wallpapering26
- wallydraigle23
- whippoorwill28
- wollastonite18
- woollinesses18
- worshipfully28
- xanthophylls31
- yellowhammer27
- yellowthroat21
- zillionaires24
- zoologically31
- zooxanthella33