not substantiated - offender against society
- oddness
- odds
- odd–lot
- odd–lot doctrine
- odiosus
- odiosus molestus
- odious
- odiousness
- odium
- odorari
- OEA
- OECD
- OEIC
- OEM
- of a different kind
- of a previous fashion
- of a previous style
- of all sorts
- of an equal size
- of any description
- of any kind or sort
- of bad character
- of consequence
- of counsel
- of course
- of decisive importance
- of doubtful certainty
- of doubtful meaning
- of equal dignity
- of equal duration
- of equal extent
- of equal force
- of equal length or volume
- of equal power
- of equal rank
- of equal value
- of equal weight
- of every description
- of everyday occurrence
- of external origin