4 letters
- rent5
- rest4
- rets4
- rhos6
- rhus7
- rias4
- ribs7
- rice7
- rich9
- rick11
- rids5
- rifs7
- rift7
- rigs6
- rims7
- rind6
- ring7
- rink9
- rins5
- riot4
- rips7
- rise4
- risk8
- rite4
- ritz13
- roan5
- robe7
- robs7
- rock11
- rocs7
- rods5
- roes4
- roil5
- roms7
- rood5
- roof7
- rook8
- room7
- root4
- rose4
- rosy6
- rota4
- rote4
- roti4
- rotl5
- roto4
- rots4
- roue5
- roup8
- rout5
- roux12
- rows7
- rube8
- rubs8
- ruby10
- ruck12
- rues5
- rugs7
- ruin6
- rums8
- rune6
- rung8
- runs6
- runt6
- ruse5
- rush7
- rusk9
- rust5
- ruth7
- ruts5
- ryot6
- sabs7
- sacs7
- sain5
- sans5
- sari4
- sati4
- scab10
- scan8
- scar7
- scat7
- scop10
- scot7
- scow10
- scry9
- scud9
- scum11
- scup11
- scut8
- secs7
- sect7
- seis4
- sent5
- sers4
- sets4
- sett4
- shin7
- shit6
- shoo6
- shot6
- shri6
- shun8
- shut7
- sibb10
- sibs7
- sice7
- sick11
- sics7
- sift7
- sign7
- silo5
- silt5
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sips7
- sire4
- sirs4
- site4
- sith6
- sits4
- skin9
- skis8
- skit8
- slit5
- slob8
- slot5
- slub9
- slur6
- slut6
- smit7
- smut8
- snib8
- snip8
- snit5
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- soar4
- sobs7
- sock11
- sods5
- soft7
- soil5
- soli5
- solo5
- sols5
- sone5
- song7
- sons5
- sook8
- soon5
- soot4
- sops7
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- soth6
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- sows7
- soys6
- spic10
- spin8
- spit7
- spot7
- spun9
- spur8
- sris4
- stab7
- star4
- stat4
- stet4
- stir4
- stoa4
- stob7
- stop7
- stow7
- stub8
- stud6
- stum8
- stun6
- suba8
- subs8
- such10