4 letters
- mura8
- murr8
- mush10
- nabs8
- nubs9
- oars4
- orbs7
- orra4
- osar4
- ours5
- parr7
- pars7
- pash9
- prau8
- pubs11
- purr8
- purs8
- push10
- rads5
- rags6
- rams7
- raps7
- rare4
- rase4
- rash6
- rasp7
- rath6
- rats4
- raws7
- rays6
- rear4
- rebs7
- resh6
- rhea6
- rhos6
- rhus7
- rias4
- ribs7
- roar4
- robs7
- rube8
- rubs8
- ruby10
- ruer5
- rues5
- ruga7
- rugs7
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruth7
- ruts5
- ryas6
- sabe7
- sabs7
- sard5
- sari4
- sark8
- sash6
- saul6
- scab10
- scar7
- sear4
- sera4
- shad7
- shag8
- shah8
- sham9
- shat6
- shaw9
- shay8
- shea6
- shri6
- shul8
- shun8
- shut7
- sibb10
- skua9
- slab8
- slub9
- slur6
- snub9
- soar4
- sora4
- sorb7
- sour5
- spar7
- spur8
- stab7
- star4
- stub8
- suba8
- subs8
- such10
- suer5
- sugh9
- sura5
- surd6
- sure5
- surf8
- swab10
- tabs7
- tabu8
- tahr6
- tars4
- taus5
- thru7
- thus7
- tsar4
- tuba8
- tubs8
- tush7
- ughs9
- upas8
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vars8
- vaus9
- wabs10
- wars7
- wash9
- waur8