4 letters
- isba7
- jibs16
- jobs16
- kifs11
- kirs8
- kobo11
- kobs11
- kois8
- kors8
- kris8
- libs8
- lobo8
- lobs8
- loof8
- loos5
- lour6
- mibs10
- mirs7
- miso7
- mobs10
- moor7
- moos7
- mors7
- nibs8
- nobs8
- noir5
- nori5
- nous6
- nubs9
- oafs7
- oars4
- obes7
- obia7
- obis7
- obit7
- oboe7
- obol8
- odor5
- offs10
- oils5
- olio5
- onus6
- oohs6
- oops7
- oots4
- opus8
- orbs7
- orby9
- orcs7
- ordo5
- ores4
- orts4
- orzo13
- osar4
- ouds6
- ours5
- oust5
- outs5
- ouzo14
- pfui11
- piso7
- pois7
- poof10
- poor7
- pouf11
- pour8
- prof10
- pros7
- pubs11
- puri8
- purs8
- rebs7
- refs7
- reif7
- reis4
- rhos6
- rhus7
- rias4
- ribs7
- rids5
- rife7
- riff10
- rifs7
- rift7
- rigs6
- rims7
- rins5
- riot4
- rips7
- rise4
- risk8
- robe7
- robs7
- rocs7
- rods5
- roes4
- roil5
- rolf8
- roms7
- rood5
- roof7
- rook8
- room7
- root4
- rose4
- rosy6
- roti4
- roto4
- rots4
- roue5
- roup8
- rout5
- roux12
- rows7
- rube8
- rubs8
- ruby10
- rues5
- ruff11
- rugs7
- ruin6
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- sari4
- seif7
- serf7
- shoo6
- shri6
- sibb10
- sibs7
- sift7
- silo5
- sire4
- sirs4
- slob8
- slub9
- slur6
- snib8
- snob8
- snub9
- soar4
- sobs7
- sofa7
- soft7
- soil5
- soli5
- solo5
- sook8
- soon5
- soot4
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- souk9
- soul6
- soup8
- sour5
- sous5
- spur8
- sris4
- stir4
- stob7
- stub8
- suba8
- subs8
- suer5
- suit5
- sumo8
- sura5
- surd6
- sure5
- surf8
- swob10
- sybo9
- tiro4
- tofu8
- tori4
- toro4
- tors4
- tour5
- trio4
- tubs8
- tuis5
- turf8
- udos6
- umbo11
- urbs8
- urds6
- uric8
- urns6
- ursa5