Co·to·nou 
(kōt′n-)
(kōt′n-) A city of southern Benin on the Bight of Benin. The largest city in the country, it is a seaport and commercial center.
- opera glass
- operagoer
- opera house
- operand
- operant
- operant conditioning
- operantly
- operate
- operatic
- operatically
- operatics
- operating expenditure
- operating expense
- operating room
- operating system
- operation
- operational
- operationalism
- operationalist
- operationally
- operations research
- operative
- operatively
- operator
- opercular