4 letters
- luff12
- mibs10
- miff13
- milo8
- mils8
- miso7
- mobs10
- moil8
- mols8
- mool8
- moos7
- nibs8
- nils6
- nobs8
- noil6
- nolo6
- oafs7
- obes7
- obia7
- obis7
- obit7
- oboe7
- obol8
- offs10
- oils5
- oily7
- olds6
- oleo5
- oles5
- olio5
- oohs6
- oops7
- oots4
- orbs7
- owls8
- piso7
- pois7
- polo8
- pols8
- poof10
- pool8
- ribs7
- riff10
- rifs7
- robs7
- roil5
- rolf8
- roof7
- sail5
- seif7
- self8
- shoo6
- sial5
- sibb10
- sibs7
- sift7
- sild6
- silk9
- sill6
- silo5
- silt5
- slab8
- slid6
- slim8
- slip8
- slit5
- slob8
- sloe5
- slog7
- slop8
- slot5
- slow8
- slub9
- snib8
- snob8
- sobs7
- sofa7
- soft7
- soil5
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- sook8
- soon5
- soot4
- sorb7
- sori4
- soul6
- stob7
- swob10
- sybo9
- syli7
- tiff10
- tils5
- toff10
- toil5
- tool5
- viol9
- wolf11
- woof10
- wool8
- woos7
- yobs9
- zoos13