9 letters
- silencing17
- sincerest13
- sincerity15
- sintering13
- sirenians11
- sistering12
- skinniest15
- skirtings16
- snitchers15
- snitching18
- sortieing12
- sprinting16
- sterlings13
- stingiest12
- stingrays14
- straining13
- stressing12
- stridency16
- stringent13
- stringers12
- stringier12
- stringing15
- stripings15
- stylising15
- stymieing17
- swingiest15
- synclines17
- syncretic18
- synergias14
- synergids15
- synergies14
- synergism17
- synergist14
- syngeneic18
- syntonies13
- syringing17
- thingness15
- tinkering17
- tinniness12
- tinseling14
- trainings13
- trenching18
- tyrannies13
- tyrannise13
- tyrosines12
- unstrings14
- wintering16
- yearnings15