Laudanum rhymes with:
duodenum, aluminum, arcanum, duodenum, lanthanum, organum, tottenham, tympanum, aluminium, aluminum, annum, arcanum, barnum, bonum, branam, brannam, brannum, branum, bucknam, burnam, burnham, bynum, canam, debnam, denham, denim, denomme, dornam, downum, dunham, dunnam, duodenum, farnam, farnham, farnum, granum, greenham, hannam, hannum, interregnum, jeyaretnam, keenum, lanham, lannom, lanthanum, lanum, linam, lynam, magnum, menem, mezhdumarodnom, molybdenum, newnam, obshchestvennom, organum, panem, phenom, platinum, plenum, putnam, puttnam, ranum, sonum, steinem, stoneham, swetnam, tottenham, tranum, tympanum, unum, vanname, vanornum, varnum, venom
Laudanum sounds like:
laden, ladino, laitinen, laotian, latenan, latham, lathan, lathem, lathon, latin, latina, latini, latino, laton, latona, latonia, lattin, laudon, lauten, lawton, layden, laythan, layton, leaden, leatham, leathem, leaton, ledden, ledeen, ledin, ledonne, leedham, leedom, lehtinen, lehtonen, leitman, letdown, lewton, leyden, liden, litan, litany, litem, lithium, lithuania, lithuanian, litman, litten, littman, littmann, litton, litwin, loadman, lodema, loden, lothian, lotion, loton, lottman, louden, loudin, loudon, louthan, lowden, lowdown, loyalton, ludden, ludeman, ludemann, ludwin, luten, lutman, luton, luttman, lutton, lyden, lydon, lytton