12 letters
- surefootedly20
- surfboarders20
- surfboarding23
- surmountable22
- surpassingly22
- surprisingly22
- surrealistic17
- surrebutters17
- surrejoinder24
- surrendering18
- surroundings19
- surveillance23
- surveillants20
- survivalisms25
- survivalists22
- survivorship26
- susurrations15
- sylviculture25
- tellurometer18
- temperatures19
- thaumaturges21
- thaumaturgic24
- tourbillions19
- transfigured20
- transfigures19
- transnatural16
- transuranics18
- transuranium19
- trifluralins19
- trifurcating22
- trifurcation20
- triturations14
- tubocurarine21
- turbellarian19
- turbidimeter20
- turbidimetry22
- turbidnesses18
- turbocharged24
- turbocharger23
- turbulencies22
- turgescences22
- turgidnesses17
- turpentining21
- turtlenecked23
- tyrannosaurs17
- uncapturable25
- uncourageous21
- undercurrent20
- underinsured18
- undersurface22
- unexpurgated28
- unmeasurable22
- unnourishing21
- unreturnable20
- unscriptural22
- unstructured20
- unsurprising21
- urbanisation18
- urbanization27
- urbanologies20
- urbanologist20
- urediospores17
- urethritises15
- urethroscope21
- uricotelisms20
- urinogenital18
- urochordates19
- urolithiases16
- urolithiasis16
- usuriousness16
- vasculatures22
- venipuncture26
- vinicultures23
- viticultural23
- viticultures22
- watercourses19
- wienerwursts20
- windsurfings24