Synonyms for Circuit (same or very similar meaning)
WordNet sense 1 (a racetrack for automobile races):
racing circuit
WordNet sense 2 (an electrical device that provides a path for electrical current to flow):
electric circuit, electrical circuit
WordNet sense 3 (a journey or route all the way around a particular place or area):
tour
WordNet sense 4 (movement once around a course):
circle, lap
From the ODE community, based on WordNet
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