4 letters
- oohs6
- opah9
- orad5
- oral5
- orca7
- orcs7
- ordo5
- orra4
- orzo13
- osar4
- ouch10
- pack14
- park11
- pock14
- poco10
- pooh9
- poor7
- pork11
- prao7
- proa7
- race7
- rack11
- racy9
- rake8
- raki8
- rank9
- rash6
- rath6
- rato4
- reck11
- rhea6
- rhos6
- rich9
- rick11
- road5
- roam7
- roan5
- roar4
- rock11
- rocs7
- rood5
- roof7
- rook8
- room7
- root4
- rota4
- roto4
- ruck12
- sack11
- sark8
- scar7
- shoo6
- soak8
- soar4
- sock11
- sook8
- sora4
- tach9
- tack11
- taco7
- tahr6
- taro4
- thro6
- took8
- tora4
- torc7
- toro4
- wack14
- wark11
- whoa9
- work11
- yack13
- yock13