10 letters
- summerlong21
- summertime20
- summerwood21
- summiteers17
- summitries17
- summonable22
- summonsing21
- superhuman21
- superjumbo30
- symposiums22
- technetium20
- telluriums17
- tenaculums20
- terrariums14
- thrummiest19
- thumbholes22
- thumbnails21
- thumbprint23
- thumbscrew25
- thumbtacks26
- thumbwheel25
- trapeziums26
- traumatise14
- traumatism17
- traumatize23
- triclinium19
- trienniums16
- trifoliums18
- triumphant20
- triumphing22
- trumperies17
- trumpeters17
- trumpeting20
- tumblebugs24
- tumbledown23
- tumblerful23
- tumbleweed22
- tumescence21
- tumidities15
- tumultuary19
- tumultuous18
- ultimatums19
- ultrahuman19
- umbellifer22
- umbilicals22
- umbilicate21
- umbrageous20
- umbrellaed20
- unassuming19
- unconsumed21
- uncrumpled24
- uncrumples23
- unhumorous19
- unnumbered21
- uropygiums22
- volumeters19
- volumetric22
- voluminous21
- wampumpeag28
- ytterbiums19
- zirconiums27