operate on perform surgery on
operation process or manner of functioning
imperative requiring attention or action
aberration a state or condition markedly different from the norm
oppression the act of subjugating by cruelty
operator an agent that operates some apparatus or machine
operate perform as expected when applied
appertain be a part or attribute of
operating involved in a kind of operation
Aberdeen a city in northeastern Scotland on the North Sea
operative producing a desired effect
opportune suitable or advantageous especially for a particular purpose
operatic of or relating to or characteristic of opera
opera hood a large cloak worn over evening clothes
operon a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
operations financial transactions at a brokerage
aperture a natural opening in something
cooperation the practice of working together on a common enterprise
operetta a short amusing opera
eye operation any surgical procedure involving the eyes