4 letters
- omit7
- once8
- ones5
- onto5
- onus6
- oops7
- oots4
- open8
- opes7
- opts7
- opus8
- orbs7
- orcs7
- ores4
- orts4
- oses4
- otic7
- ours5
- oust5
- outs5
- pecs10
- pein8
- pens8
- pent8
- peon8
- peri7
- perm10
- pert7
- peso7
- pest7
- pets7
- pice10
- pics10
- pier7
- pies7
- pine8
- pins8
- pint8
- pion8
- pirn8
- piso7
- piss7
- pits7
- poco10
- poem10
- poet7
- pois7
- pome10
- poms10
- pone8
- pons8
- poon8
- poor7
- pore7
- porn8
- port7
- pose7
- post7
- pots7
- pour8
- pout8
- prim10
- prom10
- pros7
- psis7
- psst7
- pubs11
- puce11
- puns9
- punt9
- pure8
- puri8
- purs8
- puss8
- puts8
- rebs7
- recs7
- rein5
- reis4
- rems7
- rent5
- repo7
- reps7
- rest4
- rets4
- ribs7
- rice7
- rime7
- rims7
- rins5
- riot4
- ripe7
- rips7
- rise4
- rite4
- robe7
- robs7
- rocs7
- roes4
- romp10
- roms7
- room7
- root4
- rope7
- rose4
- rote4
- roti4
- roto4
- rots4
- roue5
- roup8
- rout5
- rube8
- rubs8
- rues5
- ruin6
- rump11
- rums8
- rune6
- runs6
- runt6
- ruse5
- rust5
- ruts5
- scop10
- scot7
- scum11
- scup11
- scut8
- secs7
- sect7
- seis4
- semi7
- sent5
- sept7
- sers4
- sets4
- sibs7
- sice7
- sics7
- simp10
- sims7
- sine5
- sins5
- sipe7
- sips7
- sire4
- sirs4
- site4
- sits4
- smit7
- smut8
- snib8
- snip8
- snit5
- snob8
- snot5
- snub9
- sobs7
- some7
- sone5
- sons5
- soon5
- soot4
- sops7
- sorb7
- sore4
- sori4
- sorn5
- sort4
- sots4
- soup8
- sour5
- sous5
- spec10
- spic10
- spin8
- spit7
- spot7
- spue8
- spun9
- spur8
- sris4
- stem7
- step7
- stir4
- stob7
- stop7
- stub8
- stum8
- stun6
- subs8
- suer5
- sues5
- suet5
- suit5
- sumo8
- sump11
- sums8
- suns6