Multnomah rhymes with:
carcinoma, melanoma, sonoma, algoma, aroma, bancoklahoma, bouma, carcinoma, choma, coloma, coma, diploma, douma, glaucoma, goma, homa, leoma, loma, luoma, lymphoma, melanoma, mesothelioma, moma, naoma, neoma, nujoma, oklahoma, oma, paloma, papilloma, poma, retinoblastoma, roma, saloma, scoma, shiroma, sloma, soma, sonoma, stroma, sumatoma, tacoma, thoma, toma, troma, xoma
Multnomah sounds like:
malathion, malden, malleton, maulden, mauldin, mealtime, melatonin, meldon, meltdown, melton, militiamen, milton, molden, molten, molton, moulden, moulton, muldoon, muldowney