5 letters
- ruble10
- rubus10
- ruers6
- ruled8
- ruler7
- rules7
- runes7
- ruses6
- saber8
- sable9
- sabre8
- scrub12
- sebum12
- seral6
- serum9
- shrub11
- sieur6
- slier6
- slubs10
- slued8
- slues7
- slurb10
- slurp10
- slurs7
- slyer8
- sober8
- sorel6
- sprue9
- suber9
- sucre9
- suers6
- super9
- sural7
- surer6
- surge8
- surly9
- trues6
- tuber9
- tubes9
- tules7
- ulcer10
- umbel13
- umber12
- urase6
- ureal7
- ureas6
- urges8
- ursae6
- users6
- usher8
- verbs12
- xerus13
- yules9
- zebus18