Similar word to circumnavigation:

ambit, area, bounds, circle, circling, circulation, circumference, circumnavigation, circumscription, circumvolution, compass, course, cycle, district, gyration, gyre, journey, lap, limit, line, orbit, perambulation, perimeter, periphery, range, region, round, route, tour, tract, turn, turning, twirl, way, wheel, whirl, wind, winding, zone