4 letters
- slue6
- slut6
- smut8
- snub9
- soft7
- spue8
- stab7
- stem7
- step7
- stet4
- stew7
- stey6
- stob7
- stub8
- stud6
- stum8
- stun6
- stye6
- suba8
- subs8
- sued6
- suer5
- sues5
- suet5
- suit5
- supe8
- sure5
- surf8
- tabs7
- tabu8
- taus5
- teas4
- teds5
- tees4
- teff10
- tegs6
- tels5
- tens5
- test4
- tets4
- tews7
- thus7
- ties4
- tiff10
- toes4
- toff10
- tofu8
- tref7
- true5
- tuba8
- tube8
- tubs8
- tufa8
- tuff11
- tuft8
- tugs7
- tuis5
- tule6
- tune6
- tuns6
- tups8
- turf8
- tush7
- tusk9
- tuts5
- tyes6
- ukes9
- unbe9
- urbs8
- used6
- user5
- uses5
- utas5
- vest8
- vets8
- webs10
- weft10
- west7
- wets7
- zebu17
- zest13