4 letters
- puls9
- punk13
- puns9
- pure8
- puri8
- purl9
- purs8
- reck11
- recs7
- rein5
- reis4
- repo7
- reps7
- rice7
- rick11
- riel5
- rile5
- rink9
- rins5
- ripe7
- rips7
- rise4
- risk8
- rock11
- rocs7
- roes4
- roil5
- role5
- rope7
- rose4
- roue5
- roup8
- ruck12
- rues5
- ruin6
- rule6
- rune6
- runs6
- ruse5
- rusk9
- scop10
- scup11
- sice7
- sick11
- sike8
- silk9
- silo5
- sine5
- sink9
- sipe7
- sire4
- skep11
- skin9
- skip11
- slip8
- sloe5
- slop8
- slue6
- slur6
- snip8
- sock11
- soil5
- soke8
- sole5
- soli5
- sone5
- sore4
- sori4
- sorn5
- souk9
- soul6
- soup8
- sour5
- spec10
- spic10
- spik11
- spin8
- spue8
- spun9
- spur8
- suck12
- suer5
- sulk10
- sunk10
- supe8
- sure5
- ukes9
- unci9
- unco9
- upon9
- uric8
- urns6
- user5