4 letters
- lurk10
- mack14
- marc10
- mark11
- maun9
- muck15
- mura8
- murk12
- nabe8
- nabs8
- narc8
- nard6
- nark9
- nary7
- near5
- neck12
- neuk10
- nick12
- nock12
- nubs9
- nuke10
- numb12
- nurd7
- nurl7
- okra8
- orca7
- pack14
- park11
- prau8
- puck15
- puna9
- punk13
- race7
- rack11
- racy9
- rain5
- rake8
- raki8
- rand6
- rang7
- rani5
- rank9
- rant5
- reck11
- rick11
- rink9
- roan5
- rock11
- rube8
- rubs8
- ruby10
- ruck12
- ruga7
- ruin6
- rune6
- rung8
- runs6
- runt6
- rusk9
- sack11
- sank9
- sark8
- scab10
- scan8
- scar7
- skua9
- snub9
- suba8
- suck12
- sunk10
- sura5
- tabu8
- tack11
- tank9
- tarn5
- tuba8
- tuck12
- tuna6
- turk9
- turn6
- ulan7
- ulna7
- unai6
- unau7
- unbe9
- unci9
- unco9
- urbs8
- urea5
- uric8
- urns6
- ursa5
- wack14
- wark11
- warn8
- wauk12
- waur8
- yack13
- yank11
- yarn7
- yuan8
- yuca10
- yuck14