5 letters
- okapi12
- okras9
- orang8
- orbit8
- orcin9
- organ8
- oribi8
- ornis6
- orpin9
- orris5
- piano9
- pinko13
- prank13
- prink13
- prion9
- prior8
- rabbi11
- rabic11
- rabid9
- racon9
- radio6
- radon7
- rains6
- rainy8
- raker9
- rakis9
- ranid7
- ranis6
- ranks10
- ratio5
- ravin10
- rawin9
- rayon8
- razor14
- rebar8
- reink10
- reran6
- rhino8
- riant6
- rigor7
- rinks10
- rioja14
- roans6
- roars5
- robin9
- roman9
- rosin6
- rowan9
- sabin9
- sabir8
- sarin6
- sirra5
- skirr9
- snark10
- sonar6
- tabor8
- takin10
- tarok9
- traik9
- train6
- trank10
- troak9
- trona6
- unbar10
- urari6
- urban10
- urbia9
- wirra8