5 letters
- rheum11
- rhino8
- rhumb14
- riant6
- riata5
- roman9
- ruana7
- ruing9
- ruins7
- rumba12
- rumen10
- runic10
- rutin7
- saran6
- sarin6
- sauna7
- sharn8
- simar8
- surah8
- tharm10
- thrum11
- tiara5
- train6
- uhlan10
- ulama10
- ulnar8
- umbra12
- umiac12
- umiak13
- umiaq18
- unais7
- unarm10
- unary9
- unbar10
- uncia10
- unhat9
- unhip12
- unjam19
- unman11
- unmix17
- unrig9
- unrip10
- uraei6
- urari6
- urban10
- urbia9
- urial7
- urine7
- varia9
- varna10
- yamun12
- zamia17
- ziram17