4 letters
- irks8
- iron5
- isba7
- jibs16
- jobs16
- kirs8
- kobs11
- kois8
- kors8
- kris8
- libs8
- lobs8
- loci8
- lour6
- mibs10
- mirs7
- miso7
- mobs10
- mocs10
- mors7
- murr8
- nibs8
- nobs8
- noir5
- nori5
- nous6
- nubs9
- oars4
- obes7
- obia7
- obis7
- obit7
- ocas7
- odic8
- oils5
- onus6
- opus8
- orbs7
- orby9
- orca7
- orcs7
- ores4
- orra4
- orts4
- osar4
- otic7
- ouch10
- ouds6
- ours5
- oust5
- outs5
- pics10
- piso7
- pois7
- pour8
- pros7
- pubs11
- puri8
- purr8
- purs8
- rebs7
- recs7
- reis4
- rhos6
- rhus7
- rias4
- ribs7
- rice7
- rich9
- rick11
- rids5
- rifs7
- rigs6
- rims7
- rins5
- riot4
- rips7
- rise4
- risk8
- roar4
- robe7
- robs7
- rock11
- rocs7
- rods5
- roes4
- roil5
- roms7
- rose4
- rosy6
- roti4
- rots4
- roue5
- roup8
- rout5
- roux12
- rows7
- rube8
- rubs8
- ruby10
- ruck12
- ruer5
- rues5
- rugs7
- ruin6
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- sari4
- scab10
- scar7
- scop10
- scot7
- scow10
- scry9
- scud9
- scum11
- scup11
- scut8
- shri6
- sibb10
- sibs7
- sice7
- sick11
- sics7
- silo5
- sire4
- sirs4
- slob8
- slub9
- slur6
- snib8
- snob8
- snub9
- soar4
- sobs7
- sock11
- soil5
- soli5
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- souk9
- soul6
- soup8
- sour5
- sous5
- spic10
- spur8
- sris4
- stir4
- stob7
- stub8
- suba8
- subs8
- such10
- suck12
- suer5
- suit5
- sumo8
- sura5
- surd6
- sure5
- surf8
- swob10
- sybo9
- tics7
- tiro4
- torc7
- tori4
- torr4
- tors4
- tour5
- trio4
- tubs8
- tuis5
- udos6
- umbo11
- unci9
- unco9
- urbs8
- urds6
- uric8
- urns6
- ursa5
- urus6
- user5
- yirr6
- yobs9
- your7
- zoic16
- zori13