- obeying
- one's declining years
- oxidize
- obstructed
- ouster
- of little value
- outlawed
- occultism
- other man
- off-centre
- offcomer
- over-bearing
- obesity
- on the job
- on the road to recovery
- outlawing
- obsessive about
- once upon a time
- orders
- over-peopled
- open to attack
- on the barrelhead
- on welfare
- overset
- overlooked
- other than
- of substance
- overfamiliar
- on the outs
- osculation
- oblate
- odiousness
- overacted
- on the stocks
- over-critical
- overcrowd
- old lag
- over-brim
- opress
- old stager
- one-on-one
- on the qui vive
- offentimes
- on the doorstep
- or thereabouts
- over-wrought
- ordinances
- ordinal number
- overdose
- objecting
- on the same wavelength
- one's cross to bear
- obsecration
- on full alert
- on pins and needles
- overplayed
- owners
- of importance
- on one's last legs
- out of humour
- ovenproof
- on the blink
- on the stroke of something
- offprint
- overhadow
- on the wallaby track
- on the skew
- occurrences
- offcuts
- one's portion
- oojamaflip
- out-of-towner
- olde worlde
- owner-occupancy
- over-dramatized
- of good report
- of consequence
- obligingly
- out of sort
- overemphasized
- outer limits
- one's salad days
- over and above that
- off target
- overkill
- overwight
- old wives' tales
- outside of
- oojah
- of ample proportions
- on the streets
- owner-occupier
- outcold
- on the go
- overfamili-arity
- overpopulated
- overelaborate
- out of the ark
- opium
- oojamafflip