4 letters
- opts7
- opus8
- orbs7
- orts4
- osar4
- ossa4
- ouds6
- ours5
- oust5
- outs5
- owns8
- pans8
- pant8
- past7
- pats7
- pfft13
- pons8
- post7
- pots7
- pouf11
- pout8
- pubs11
- puff14
- puna9
- puns9
- punt9
- puts8
- qats13
- raff10
- raft7
- rant5
- rato4
- rats4
- roan5
- robs7
- rota4
- rots4
- rout5
- rubs8
- ruff11
- runs6
- runt6
- rust5
- ruts5
- sabe7
- sabs7
- safe7
- sago6
- sain5
- salt5
- sand6
- sane5
- sang7
- sank9
- sans5
- sate4
- sati4
- saul6
- sawn8
- scab10
- scan8
- scat7
- scot7
- scut8
- seat4
- sent5
- seta4
- shat6
- shot6
- shun8
- shut7
- sift7
- skat8
- skua9
- slab8
- slat5
- slob8
- slot5
- slub9
- slut6
- smut8
- snag7
- snap8
- snaw8
- snib8
- snit5
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- soak8
- soap7
- soar4
- sobs7
- soda5
- sofa7
- soft7
- soja13
- sola5
- soma7
- sone5
- song7
- sons5
- soon5
- soot4
- sora4
- sorb7
- sorn5
- sort4
- soth6
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- soya6
- span8
- spat7
- spot7
- spun9
- stab7
- stag6
- star4
- stat4
- staw7
- stay6
- stoa4
- stob7
- stop7
- stow7
- stub8
- stud6
- stum8
- stun6
- suba8
- subs8
- suet5
- suit5
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surf8
- swab10
- swan8
- swat7
- swob10
- swot7
- sybo9
- tabs7
- tabu8
- taco7
- tads5
- tags6
- tain5
- tams7
- tang7
- tank9
- tans5
- taos4
- taps7
- tarn5
- taro4
- tars4
- task8
- tass4
- tats4
- taus5
- taut5
- tavs8
- taws7
- teas4
- teff10
- tens5
- than7
- thou7
- thus7
- tiff10
- tins5
- toad5
- toby9
- tods5
- toea4
- toes4
- toff10
- toft7
- tofu8
- toga6
- togs6
- tola5
- tolu6
- tomb10
- toms7
- tone5