4 letters
- onto5
- onus6
- oots4
- opts7
- opus8
- orts4
- osar4
- ossa4
- otto4
- ouds6
- ours5
- oust5
- outs5
- oval9
- oven9
- ovum12
- owns8
- pans8
- pant8
- past7
- pats7
- pons8
- post7
- pots7
- pout8
- puna9
- puns9
- punt9
- puts8
- putt8
- qats13
- rant5
- rato4
- rats4
- roan5
- rota4
- rots4
- rout5
- runs6
- runt6
- rust5
- ruts5
- sago6
- sain5
- salt5
- sand6
- sane5
- sang7
- sank9
- sans5
- sate4
- sati4
- saul6
- save8
- sawn8
- scan8
- scat7
- scot7
- scut8
- seat4
- sent5
- seta4
- sett4
- shat6
- shot6
- shun8
- shut7
- skat8
- skua9
- slat5
- slot5
- slut6
- smut8
- snag7
- snap8
- snaw8
- snit5
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- soak8
- soap7
- soar4
- soda5
- sofa7
- soft7
- soja13
- sola5
- soma7
- sone5
- song7
- sons5
- soon5
- soot4
- sora4
- sorn5
- sort4
- soth6
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- soya6
- span8
- spat7
- spot7
- spun9
- stab7
- stag6
- star4
- stat4
- staw7
- stay6
- stet4
- stoa4
- stob7
- stop7
- stow7
- stub8
- stud6
- stum8
- stun6
- suba8
- suet5
- suit5
- sulu7
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swan8
- swat7
- swot7
- tabs7
- tabu8
- taco7
- tact7
- tads5
- tags6
- tain5
- tams7
- tang7
- tank9
- tans5
- taos4
- taps7
- tarn5
- taro4
- tars4
- tart4
- task8
- tass4
- tate4
- tats4
- taus5
- taut5
- tavs8
- taws7
- teas4
- teat4
- tens5
- tent5
- test4
- tets4
- than7
- that6
- thou7
- thus7
- tins5
- tint5
- tits4
- toad5
- tods5
- toea4
- toes4
- toft7
- tofu8
- toga6
- togs6
- toit4
- tola5
- tolu6
- toms7
- tone5
- tong7
- tons5
- tony7
- toon5
- toot4
- tops7
- tora4
- torn5