4 letters
- sibs7
- sire4
- sirs4
- skas8
- skua9
- slab8
- slub9
- slue6
- slur6
- snub9
- soar4
- sobs7
- sora4
- sorb7
- sore4
- sour5
- sous5
- spae7
- spar7
- spas7
- spue8
- spur8
- sris4
- stab7
- star4
- stub8
- suba8
- subs8
- suds6
- sued6
- suer5
- sues5
- suet5
- sums8
- suns6
- supe8
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- swab10
- tabs7
- tabu8
- tare4
- tars4
- tass4
- taus5
- tear4
- teas4
- true5
- tsar4
- tuba8
- tube8
- tubs8
- ukes9
- unbe9
- upas8
- urbs8
- urds6
- urea5
- urge7
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- utas5
- uvea9
- vars8
- vase8
- vaus9
- vera8
- verb11
- wabs10
- waes7
- ware7
- wars7
- waur8
- wear7
- webs10
- wuss8
- yare6
- year6
- yeas6
- zebu17