4 letters
- rick11
- rigs6
- rind6
- ring7
- rink9
- rins5
- ritz13
- roan5
- roar4
- rube8
- rubs8
- ruby10
- ruck12
- ruer5
- ruga7
- rugs7
- ruin6
- rune6
- rung8
- runs6
- runt6
- sain5
- sang7
- sari4
- scab10
- scag9
- scan8
- scar7
- sign7
- sing7
- snag7
- snib8
- snub9
- snug8
- suba8
- sung8
- sura5
- tabu8
- tain5
- tang7
- tarn5
- ting7
- trig6
- trug7
- tuba8
- tuna6
- tung8
- turn6
- tzar13
- ulan7
- ulna7
- unai6
- unau7
- unbe9
- unci9
- unco9
- unit6
- urbs8
- urea5
- urge7
- uric8
- urns6
- ursa5
- vagi10
- vain9
- vair8
- vang11
- viga10
- vina9
- wain8
- wair7
- warn8
- waur8
- wing10
- yagi8
- yang9
- yarn7
- yirr6
- yuan8
- yuca10
- yuga9
- zags15
- zany16
- zarf16
- zebu17
- zein14
- zigs15
- zinc17
- zing16
- zins14
- ziti13
- zoic16
- zori13