Coagulation rhymes with:
deregulation, overregulation, regulation, reregulation, strangulation, accumulation, articulation, calculation, confabulation, deregulation, emulation, formulation, granulation, innoculation, inoculation, manipulation, miscalculation, overpopulation, overregulation, ovulation, population, recalculation, regulation, reregulation, simulation, speculation, stimulation, stipulation, strangulation, tabulation, tribulation
Coagulation sounds like:
caledonia, caledonian, calton, celadon, chilton, claudian, claudina, claudine, clayton, cleeton, coalition, colden, collodion, colodny, colton, culleton, culton