Morphine rhymes with:
acetylcholine, alexandrine, alphonsine, amrine, austine, benedictine, benzine, benzodiazepine, berezine, bernadene, bernardin, berstein, blitstein, bobzien, brecheen, bridenstine, celene, chlorine, clarine, colchicine, correne, damaclean, dechene, dentine, derstine, deschene, dexfenfluramine, dorene, duchene, durene, earlene, eleen, elene, emogene, erlene, fabien, faustine, fenfluramine, gangrene, gradstein, groene, grudzien, haseltine, hedeen, herendeen, hesseltine, hoene, horine, howenstine, ilene, isleen, kamin, karabin, kwiecien, levene, lindeen, lipoprotein, litalien, lundeen, lupien, lurlene, lysine, marien, mcerlean, methamphetamine, mishkin, nerine, nifedipine, o'guin, oguin, oien, phenylthaline, pristine, pyroxene, rexene, rosene, rudeen, rudenstein, ryanodine, samarin, sandeen, sapien, sasseen, sawin, schoene, semien, shirlene, shorenstein, simien, stempien, sundeen, tarin, therien, therrien, thoene, vanalstine, vereen, verene, waterstein, whetstine, zapien
Morphine sounds like:
marubeni, marvin, mehrabian, mervin, mervine, mervyn, minervini, moravian, morfin, morphin, morven, murfin