- o'clock
- ossified
- once a day
- on the HP
- of benefit
- on reflection
- on the top
- Old Dart
- on the other hand
- of long ago
- one at a time
- open wide
- on horseback
- orga-nize
- official killer
- outgoing person
- overview
- orthodontist
- outlying districts
- open one's heart
- opulently
- out of position
- out-of-doors
- obit
- order back
- open to suggestions
- over-suspicious
- occupied in
- open to
- objects
- on the distaff side
- of no consequence
- other ranks
- on the far side of
- observe the rules
- outbuilding
- ostenta-tious
- off the peg
- old fogy
- obsessive fear
- over-abundance
- on the sly
- open out
- oblong
- out in the open
- overstress
- on schedule
- on the alert
- offcial
- onesidedness
- object of ridicule
- own particular
- open someone's eyes
- official separation
- Olympic
- overambitious
- other possibility
- oxen
- of the greatest significance
- occur again
- of influence
- outburst of anger
- on the authority of
- officiate at
- on good terms
- oversimplified
- offer marriage
- outer ear
- outpatients' department
- over again
- official opening
- over-inflated
- overplay it
- of course not
- of greatest significance
- over-trusting
- off the rack
- over-ornate
- over-sentimental
- overeating
- one and only
- out of keeping with
- out of a job
- over-elaborate
- on every occasion
- out-spoken
- opposite number
- omnibus
- offer condolences to
- old clothes
- onesided
- oftend against
- ovrthrow
- of greatest importance
- overjoy-ed
- ousting
- offen-sive
- open to the elements
- one single time
- outstretched