12 letters
- sericultural19
- sericultures18
- sextuplicate27
- silviculture23
- spiritualism20
- spiritualist17
- spirituality19
- spiritualize26
- statuesquely26
- structurally21
- stubbornness21
- studentships20
- studiousness16
- stuffinesses20
- stupefaction23
- stupefyingly27
- stupendously22
- stupidnesses18
- sturdinesses15
- subculturing25
- subminiature21
- subsaturated18
- substituents18
- substituting20
- substitution18
- substitutive21
- substructure21
- supernatural19
- supernatures18
- superstratum20
- sylviculture25
- temperatures19
- thaumaturges21
- thaumaturgic24
- tortuosities13
- tortuousness15
- transnatural16
- triturations14
- tuberculated22
- tuberculoses21
- tuberculosis21
- tuberosities16
- tubocurarine21
- tumefactions23
- tumultuously23
- tunabilities18
- turbellarian19
- turbidimeter20
- turbidimetry22
- turbidnesses18
- turbocharged24
- turbocharger23
- turbulencies22
- turgescences22
- turgidnesses17
- turpentining21
- turtlenecked23
- uncapturable25
- unctuousness20
- understudied18
- understudies17
- unfortunates19
- unpunctuated24
- unreturnable20
- unscriptural22
- unstructured20
- usufructuary24
- valetudinary22
- vasculatures22
- venipuncture26
- vicissitudes21
- vinicultures23
- virtualities18
- virtuosities17
- virtuousness19
- viticultural23
- viticultures22
- vituperating23
- vituperation21
- vituperative24
- vituperators20
- vituperatory22
- voluptuaries22
- voluptuously26