Mottern rhymes with:
best-western, cistern, eastern, intern, lantern, lectern, matern, mattern, mideastern, midwestern, morganstern, morgenstern, northeastern, northwestern, pattern, saturn, southeastern, southwestern, transwestern, western
Mottern sounds like:
madron, mandarin, mandarine, mandarino, matern, materna, mathern, matherne, matrimony, matron, mattern, mediterranean, medrano, midterm, minturn, mitrano, modern, moderne, mondrian, montrone, motoren, motrin, mottram