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Noun: pump jack
  1. The overground drive for a reciprocating piston pump installed at a borehole (e.g. an oil well)
    - nodding donkey

Encyclopedia: Pump jack

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pulverulent
puma
pumice
pumice stone
pumiceous
pummel
pummelo
pump
pump action
pump house
pump jack
pump priming
pump room
pump well
pump-and-dump scheme
pumped
pumped up
pumped-up
pumper
pumpernickel
pumping station