Zumbro rhymes with:
dimambro, fambro, gambro, hambro, kimbro, lambro, albro, bilbro, calabro, chesbro, chesebro, cibro, culbro, dimambro, disbro, fambro, gabbro, gambro, hambro, hasbro, kimbro, lambro, phibro, scarbro, walbro, yarbro, ziobro
Zumbro sounds like:
zamfir, zanamivir, zembower, zimpfer