 |
 |
 |
British | Canadian | American |
O | ||
OAP, old aged pensioner, pensioner, senior citizen | senior, OAP, old aged pensioner, senior citizen | senior, senior citizen |
| odds and ends, odds and sods, bits and bobs | odds and ends | odds and ends |
| old age pension | old age security | social security check |
off-licence, offie, beer & wine store | liquor store, bond store (Nfld) | liquor store |
| oilskins | slicker, sou'wester (east coast) | slicker |
old boy, old girl | alumnus, alumni, alumna, alum | alumni, alumnus, alumna, alum |
| on foot | on foot, afoot | on foot, afoot |
on heat | in heat | in heat |
| ONO (or nearest offer) | OBO (or best offer) | OBO (or best offer) |
| open-plan (house) | open-plan, open concept | open-plan |
operating theatre | operating room, OR | operating room, OR |
optician | optometrist, optician | optometrist |
| out tray | out tray, out basket | out tray, out basket |
| oven glove | oven mitt | oven mitt |
overalls (different from American 'overalls`) | coveralls | coveralls |
| overheads | overhead | overhead |
| overtake (a car) | pass | pass |
Oxfam, second-hand shop, charity shop | thrift store, second-hand store, Value Village | thrift store, second-hand store, Value Village |
