Caffeine rhymes with:
coffeen, fiene, agin, aileen, aldin, aleen, alene, alzene, ameen, amin, ammeen, andreen, aquamarine, ardeen, arleen, arreguin, augustin, baleen, bean, beane, beene, bein, beine, benyamin, benzene, bernadine, between, biehn, bien, blouin, brackeen, bradeen, brean, breen, burdine, burkeen, canteen, cantin, careen, carleen, casein, cashion, casteen, cathleen, celine, charleen, charlene, charline, chasteen, cheane, chretien, christine, cian, circumvene, citrine, claudine, clean, clymene, coffeen, coleen, colleen, convene, corinne, cortine, crean, crimean, cuisine, cunneen, d'alene, dean, deane, deen, dejean, demean, deneen, derouin, dineen, dinneen, doralin, doreen, drouin, dufrene, eighteen, eileen, eugene, feldene, fiene, fifteen, figurine, filene, foltene, foreseen, fourteen, francine, frean, freen, gallien, gean, gelatine, gene, geneen, georgine, geraldine, gheen, glasheen, glean, godine, goheen, gouin, green, greene, grosjean, guertin, haen, hallowe'en, halloween, helene, huguenin, hunchine, igene, intervene, ireene, irene, janine, jean, jeane, jeanine, jeanne, joaquin, jolene, justine, kathalene, kathleen, kean, keane, keehn, keen, keene, kiehn, kiehne, kiene, killeen, kleen, kristine, lamine, latrine, laureen, laurene, lean, ledeen, leen, lein, lene, levine, lien, lopatin, lorene, lurleen, machine, macqueen, madelene, mandarine, marcin, marean, marine, marleen, marleene, marroquin, martine, maureen, maxine, mcbean, mcbreen, mcclean, mckean, mckeen, mclean, mcmeen, mcqueen, mcsween, mean, medin, mein, meine, mien, modine, moline, moquin, moreen, mujahedeen, mujahideen, mulqueen, muntean, myrlene, nadine, nathene, navin, nein, nene, nineteen, nitrosomine, nordeen, noreen, norma-jean, nuveen, o'steen, obscene, ocain, olean, onscreen, oquin, oquinn, papin, pasion, pauline, peine, peloquin, philene, pilgreen, plein, poliquin, preen, prejean, preteen, prien, propylene, queen, rabin, rabine, racine, ravine, reconvene, reen, routine, sabine, salin, saline, sarazin, sardine, sarene, scene, screen, seen, seguin, selene, serene, seventeen, shaheen, sharleen, shasteen, shean, sheen, shirleen, sistine, sixteen, skeen, skene, slovene, smithereen, spleen, spreen, steen, stene, st_jean, submachine, sunscreen, sween, tambourine, tangerine, teen, thien, thirteen, tigrean, trampoline, treen, umpteen, unclean, unforeseen, unseen, vaccine, vaguine, valentin, vanveen, varin, veen, vidrine, vien, voisine, wean, wein, wien, wileen, wolverine, xene
Caffeine sounds like:
c-span, caban, cabana, cabin, cacophony, capano, capen, capon, capone, caponi, capuano, caspian, cauffman, cavan, cavanah, caveman, caven, cavin, chabon, chaffin, chafin, chapin, chapman, chauvin, chavin, cheapen, cheekbone, chiappone, chiffon, chipman, chopin, chovan, cobain, cobaine, coben, cobian, cobin, coffeen, coffin, coffman, coopman, copeman, copen, coppin, coupon, coven, coveney, covin, covina, covino, cspan, cuban