Regulation rhymes with:
deregulation, overregulation, deregulation, overregulation, coagulation, deregulation, overregulation, reregulation, strangulation, accumulation, articulation, calculation, coagulation, confabulation, deregulation, emulation, formulation, granulation, innoculation, inoculation, manipulation, miscalculation, overpopulation, overregulation, ovulation, population, recalculation, reregulation, simulation, speculation, stimulation, stipulation, strangulation, tabulation, tribulation