- onam
- own brand
- ones right hand
- over head and ears
- outrank
- overhead costs
- one with deformed limbs of without limbs
- outbound
- old saying
- oaten
- one who feeds
- oviparous
- oedipus
- otherness
- oversimplify
- over the counter
- one man
- orgies
- one that can excel
- outward things
- ocr
- ontology
- ochery
- oil squeezers
- one who dedicates
- onliness
- oozing latex
- onto
- opposite bank
- overpay
- ominiscience
- owe to
- on the safe side
- office bearer
- one-way street
- offense
- objectiveness
- on one's high horse
- orpiment
- odourless
- owner occupied
- of price
- on the stroke
- orbiculation
- octopod
- out in one's reckoning
- overgrazing
- overdevelop
- outwear
- optometry
- oft-ignored
- oblong pond
- oersted
- one who toil ceaselessly to support his family
- old money
- objure
- out act
- oxygenation
- online
- obscura
- of the first water
- oxide
- odium
- oat
- oath
- obelisk
- observable
- overawed
- obsession
- obstruction
- obviously
- occasionally
- odorous
- on sight
- over worn
- on patrol
- of no effect
- orchid
- optical centre
- of some sort
- osseous
- oniomania
- of wide fame
- off
- off colour
- off kilter
- onomatopoeia
- oil bottle
- oil of terminalia
- old age
- old boy network
- one track
- on credit
- outbrave
- on fall
- on the score of absurdity
- on occasion
- on one's hand
- on one's legs
- on the nose