Browse the Oxford Advanced Learner's Dictionary
- opera
noun - operable
adjective - operand
noun - operate
verb - operatic
adjective - operating profit
noun - operating system
noun - operating table
noun - operating theatre
noun - operation code
noun - Operation Desert Shield
- Operation Desert Storm
- Operation Drake
- operation
noun - operational
adjective - operational research
noun - operationally
adverb - operations room
noun - operative
adjective - operative
noun - operator
noun - operetta
noun - ophthalmic
adjective - ophthalmic optician
noun - ophthalmologist
noun - ophthalmology
noun - opiate
noun - opine
verb - opinion
noun - opinion poll
noun - opinionated
adjective - opioid
adjective - opioid
noun - opium
noun - opossum
noun - opponent
noun - opportune
adjective - opportunely
adverb - opportunism
noun - opportunist
adjective - opportunist
noun - opportunistic
adjective - Opportunity
- opportunity cost
noun - opportunity
noun - opportunity shop
noun - opposable
adjective - oppose
verb - opposed
adjective - opposing
adjective