Similar word to operation:

act, action, activity, affair, agency, application, ballgame, bit, carrying on, conveyance, course, deal, deed, doing, effect, effort, employment, engagement, enterprise, exercise, exercising, exertion, exploitation, force, handiwork, happening, influence, instrumentality, labor, manipulation, motion, movement, performance, play, procedure, proceeding, process, progress, progression, scene, service, transaction, transference, trip, undertaking, use, work, workmanship


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