4 letters
- skin9
- skip11
- skis8
- skit8
- skua9
- slam8
- slay7
- slid6
- slim8
- slip8
- slit5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- smit7
- smug10
- smut8
- soil5
- soli5
- souk9
- soul6
- spik11
- stum8
- suck12
- suit5
- sulk10
- sulu7
- sumo8
- sump11
- sums8
- sunk10
- swim10
- swum11
- syke10
- syli7
- tils5
- tuis5
- tusk9
- ugly10
- ukes9
- ulus7
- umps11
- vims11
- wily10
- yaks10
- yams9
- yelk11
- yeuk11
- yids7
- yill8
- yins7
- yips9
- ylem10
- yoks10
- yolk11
- yuck14
- yuks11
- yule8
- yups10
- ywis9