- offending
- off the peg
- oviposit
- obli-gation
- open one's heart to
- of the time
- occur to
- out of condition
- objecti-vity
- of mixed breed
- ornateness
- odd-job man
- on one occasion
- opening move
- overdo it
- office-holder
- oesophagus
- on one's head
- one of
- out of trouble
- ordeals
- optical
- openwork
- over talk round
- observation post
- ocean liner
- over-anxious
- overstate the case
- ornaments
- officially approve
- observe furtively
- opening ceremony
- outlandishness
- once-a-year
- on attach special importance to
- open to
- of the same family
- open one's heart
- one only
- one step at a time
- only remaining
- onward
- opposable digit
- on the basis of
- object strongly to
- one's notice
- outbuilding
- once a year
- openness
- out of proportion to
- overspill
- overstated
- offer one's services
- occur with
- outflank
- one's regrets
- opposed to
- on standby
- o'clock
- oven-ready
- obsessed with one's health
- over and done with
- order about
- of one's own volition
- on top form
- official approval
- official list
- overwritten
- out loud
- on every side
- offertory
- on the lose
- obsessional
- on track
- on show
- official residence
- origination
- officialdom
- open to the public
- opposite each other
- open up
- optical illusion
- orthodontist
- orchestration
- obtain by force
- of bad reputation
- overlap
- on one' head
- on a large scale
- of the Dark Ages
- of benefit to
- overstretch
- on condition that
- offer up
- overflow with
- overseas
- onwards
- objec t
- on to the shore
- olive green