5 letters
- primo11
- prion9
- purin10
- quoin16
- racon9
- recon9
- rhino8
- ricin9
- robin9
- roman9
- rosin6
- rouen7
- round8
- ruing9
- ruins7
- rumen10
- rumor9
- runic10
- rutin7
- scion9
- scorn9
- scour9
- scrim11
- scrum12
- scurf12
- sonic9
- tonic9
- toric8
- tumor9
- tunic10
- umiac12
- unarm10
- uncia10
- uncos10
- uncoy12
- unfit10
- unfix17
- unify12
- union8
- unmix17
- unrig9
- unrip10
- ureic9
- urine7
- yonic11
- yourn9