on n - outs
- on no account
- on oath
- on oath
- on occasion
- on off
- on offer
- on one's account
- on one's account
- on one's beam ends
- on one's beam ends
- on one's doorstep
- on one's fathers side
- on one's fathers side
- on one's honour
- on one's last legs
- on one's legs
- on one's legs
- on one's mettle
- on one's mettle
- on one's mind
- on one's own
- on one's own
- on one's own account
- on one's own account
- on one's own initiative
- on one's own initiative
- on one's own volition
- on one's own volition
- on one's tod
- on one's tod
- on order
- on pain of death
- on pain of death
- on par with
- on parole
- on parole
- on part with
- on pins and needles
- on pins and needles
- on position