Nouns

(n)gear, gear wheel, geared wheel, cogwheela toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
(n)gearing, gear, geartrain, power train, trainwheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed“the fool got his tie caught in the geartrain”
(n)gear, gear mechanisma mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle)
(n)gear, paraphernalia, appurtenanceequipment consisting of miscellaneous articles needed for a particular operation or sport etc.

Verbs

(v)gear, pitchset the level or character of“She pitched her speech to the teenagers in the audience”