Procaine rhymes with:
hurricane, pellicane, sugarcane, accutane, acquitaine, airplane, alleyne, asiain, badelain, biplane, birdbrain, bloodstain, bonvillain, brisbane, casgrain, cellophane, chamberlayne, charlemagne, chlordane, clephane, cobain, cobaine, coltrain, culhane, cullinane, dogbane, dunblane, ethane, eyestrain, fishbaine, floodplain, forebrain, henbane, hossein, hurricane, kardashian, keohane, lafontaine, lindane, machain, magrane, mangiapane, matabane, mcelvain, mcelvaine, mcelwain, mcelwaine, mcilvain, mcilvaine, mcilwain, membrane, messiaen, methane, migraine, monoplane, outgain, overlain, pellicane, pentane, petrolane, polyurethane, powertrain, propane, ronayne, sarbane, sartrain, seatrain, seldane, sugarcane, sulfurophane, tompane, urethane, warplane, windowpane
Procaine sounds like:
paragon, paraguayan, parchman, parisian, parisienne, parkin, parkison, parkman, parsimony, parson, pearson, peerson, pehrson, peirson, peragine, percussion, pergamon, perignon, perkin, perricone, persian, person, persona, personae, persson, persuasion, persyn, perugina, perugini, perzigian, pharisaism, pherson, phrygian, pieraccini, pierson, powergen, precession, precision, prejean, pressman, presson, presume, prezzano, prism, prison, prizm, procaccini, procassini, procession, prochnow, progeny, prussian, purgason, pyroxene