Manternach rhymes with:
banach, bembenek, benak, benecke, beneke, brannock, brignac, canonic, canuck, charnock, chinnock, dornak, enoch, eunuch, fanuc, gananoque, garnock, gignac, hanak, hannoch, harnack, hornack, hornak, hrivnak, isogenic, janak, jannock, kanak, kinnock, kraynak, laminack, lexiphonic, manak, pennock, pinnock, rappahannock, rasnake, rusnak, rusnock, sharpnack, stronach, thornock, zanuck, zelenak
Manternach sounds like:
mandarins, matranga, matrons, maturing, maundering, maunderings, meandering, medtronic, mentoring, metering, metternich, midrange, midterms, mitering, modernize, modernizes, moderns, monitoring, mothering, motoring, muttering, mutterings