4 letters
- nibs8
- nick12
- nill7
- nils6
- nims8
- nips8
- nisi5
- nits5
- noil6
- nous6
- nubs9
- nuke10
- null8
- nuns7
- nurl7
- nuts6
- oils5
- oink9
- onus6
- pfui11
- pink12
- pins8
- plus9
- puli9
- puls9
- punk13
- puns9
- quin15
- rifs7
- rink9
- rins5
- risk8
- ruin6
- runs6
- rusk9
- sail5
- sain5
- saki8
- sank9
- saul6
- seif7
- self8
- shin7
- shul8
- shun8
- sial5
- sick11
- sift7
- sign7
- sike8
- sild6
- silk9
- sill6
- silo5
- silt5
- sine5
- sing7
- sinh7
- sink9
- sins5
- skid9
- skim11
- skin9
- skip11
- skis8
- skit8
- skua9
- slid6
- slim8
- slip8
- slit5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snib8
- snip8
- snit5
- snub9
- snug8
- soil5
- soli5
- souk9
- soul6
- spik11
- spin8
- spun9
- stun6
- suck12
- suit5
- sulk10
- sulu7
- sung8
- sunk10
- sunn7
- suns6
- surf8
- syli7
- tils5
- tins5
- tuis5
- tuns6
- tusk9
- ukes9
- ulan7
- ulna7
- ulus7
- unai6
- unci9
- unit6
- urns6
- wink12
- wins8
- yins7
- yuks11
- zins14