Clocking rhymes with:
blocking, flocking, locking, unlocking, blocking, cocking, docking, flocking, hocking, knocking, locking, mocking, restocking, rocking, shocking, socking, stocking, undocking, unlocking
Clocking sounds like:
calgene's, calkins, callousness, caulking, caulkins, chalking, clackamas, clashing, classing, clausing, clicking, cloaking, clogging, closeness, closing, closings, clucking, coalescence, coalescing, collegians, collisions