4 letters
- oink9
- olio5
- onto5
- onus6
- oohs6
- ordo5
- orgy8
- orzo13
- ouch10
- ouph10
- ours5
- ouzo14
- phon10
- ping10
- pion8
- pirn8
- pong10
- pooh9
- poon8
- poor7
- porn8
- pour8
- prig9
- prog9
- pugh12
- pung11
- puri8
- quin15
- ragi6
- rain5
- rang7
- rani5
- rein5
- rhos6
- rhus7
- rich9
- rigs6
- rind6
- ring7
- rink9
- rins5
- riot4
- roan5
- roil5
- rood5
- roof7
- rook8
- room7
- root4
- roti4
- roto4
- roue5
- roup8
- rout5
- roux12
- ruga7
- rugs7
- ruin6
- rune6
- rung8
- runs6
- runt6
- rush7
- ruth7
- shin7
- shog8
- shoo6
- shri6
- shun8
- sigh8
- sign7
- sing7
- sinh7
- snog7
- snug8
- song7
- soon5
- sori4
- sorn5
- sour5
- sugh9
- sung8
- sunn7
- thin7
- thio6
- thir6
- thou7
- thro6
- thru7
- thug9
- ting7
- tiro4
- tong7
- toon5
- tori4
- torn5
- toro4
- tour5
- trig6
- trio4
- trug7
- tung8
- turn6
- ughs9
- unai6
- unci9
- unco9
- undo7
- unit6
- unto6
- upon9
- urge7
- uric8
- urns6
- vino9
- vugh13
- whig11
- whin10
- whir9
- wing10
- wino8
- worn8
- yogh10
- yogi8
- yoni7
- your7
- zing16
- zoon14
- zori13