- overwhelm-ing
- over-embellish
- oppressiveness
- only slightly
- oozy
- of good repute
- off work
- oppose strongly
- outward display
- on or above the surface
- ossuary
- oats
- or the like
- over-refined
- one and all
- ornithology covert
- open-handedness
- of no matter
- one's time on earth
- outpatient
- one's own
- of immeasurable value
- oblivious to
- ode
- on many occasions
- one of these days
- operating
- over-appreciative
- orbiting
- of one voice
- on bended knee
- old warhorse
- outrageousness
- operating costs
- on the right track
- open to change
- off drugs
- oiled
- overzealous
- on end
- off the latch
- of no moment
- obstacles
- one hundred percent
- outflux
- over the odds
- on the jungle telegraph
- opponents
- on the verge of tears
- overwrite
- overfull
- old fashioned
- other woman
- owing someone a debt of gratitude
- Ozalid
- of little importance
- on your way
- owing to the fact that
- outreach
- one or two
- outstretch
- observed
- on vacation
- old boy
- owing a debt of gratitude
- obtrusion
- other side of the coin
- outpost
- Old Nick
- overtire
- over-elaborateness
- okey-dokey
- on an equal footing
- occupy oneself
- Oxford blue
- of immeasurable worth
- oatmeal
- onrush
- outcrop
- one after another
- on top of that
- overcurious
- on the slate
- ordination
- open-work
- of the cuff
- off the subject
- one-sidedness
- off-course
- one's lot in life
- of a kind
- outturn
- ocean-going
- on level with
- opposers
- on numerous occasions
- one's marching orders
- overlord
- obtrude on
- out of harm's way