5 letters
- riper8
- ripes8
- risen6
- riser5
- rises5
- risus6
- rites5
- river9
- rives9
- robes8
- roues6
- rouse6
- rubes9
- ruble10
- rubus10
- ruder7
- ruers6
- ruins7
- ruler7
- rules7
- runes7
- ruses6
- saber8
- sabir8
- sabre8
- scrub12
- sebum12
- serai5
- serer5
- serif8
- serin6
- serry7
- serum9
- shier7
- shire7
- shirr7
- shrub11
- sieur6
- siker9
- sired6
- siree5
- siren6
- sires5
- sirra5
- sirup9
- siver9
- sizer14
- skier9
- skirr9
- slier6
- slurb10
- sober8
- sorer5
- speir8
- spier8
- spire8
- sprue9
- squib18
- suber9
- sucre9
- suers6
- suite6
- super9
- surer6
- surge8
- surra6
- tiers5
- tires5
- tribe8
- trier5
- tries5
- truer6
- trues6
- tuber9
- tubes9
- umber12
- uraei6
- urare6
- urari6
- urase6
- urbia9
- ureas6
- ureic9
- urger8
- urges8
- urine7
- ursae6
- users6
- usher8
- uteri6
- verbs12
- vibes12
- viers9
- vires9
- virus10
- weirs8
- wirer8
- wires8
- wiser8
- wrier8
- wries8
- xerus13
- yirrs7
- zebus18