- adorn
- annotator
- anon
- around
- arrant
- aunt
- darn
- daunt
- donor
- donut
- dunno
- naan
- nada
- nana
- narrator
- natant
- nonart
- noon
- notator
- noun
- onto
- orotund
- outran
- outrun
- radon
- rand
- rando
- rant
- rattan
- roan
- rondo
- rotund
- rotunda
- round
- runaround
- runout
- runt
- tandoor
- tantara
- tantra
- tartan
- taunt
- toon
- torn
- tornado
- truant
- tuna
- tundra
- turn
- turnaround
- turnout
- udon
- undo
- unto