activity vs operation

Other hyponyms of activity include update, variance, variation, space walk, domesticity, pattern, practice, diversion, recreation, bag, cup of tea, dish, follow-up, followup, game, play, turn, music, acting, performing, playacting, playing, animation, liveliness, burst, fit, work, deeds, works, service, business, job, line, line of work, occupation, occupation, committal to writing, writing, role, actus reus, misconduct, wrongdoing, wrongful conduct, dissipation, waste, wastefulness, attempt, effort, endeavor, endeavour, try, control, protection, sensory activity, didactics, education, educational activity, instruction, pedagogy, teaching, grooming, preparation, training, representation, creation, creative activity, disassembly, dismantlement, dismantling, puncture, hunt, hunting, search, employment, exercise, usage, use, utilisation, utilization, military operation, measure, measurement, measuring, mensuration, calibration, standardisation, standardization, organisation, organization, grouping, support, supporting, continuance, continuation, procedure, process, ceremony, ceremony, worship, activating, activation, energizing, concealing, concealment, hiding, emplacement, locating, location, placement, position, positioning, provision, supply, supplying, demand, pleasure, delectation, enjoyment, lamentation, mourning, laughter, market, market place, marketplace, politics, preparation, readying, aid, assist, assistance, help, support, behavior, behaviour, conduct, doings, behavior, behaviour, leadership, leading, precedence, precedency, precession, solo, buzz, fun, outlet, release, vent, last, mystification, obfuscation, negotiation, verbalisation, verbalization, disturbance, perturbation, timekeeping.

Other hyponyms of activity include agency, busyness, hum, behavior, behaviour, eructation, eruption, extravasation, overdrive, play, swing.