Umbaugh rhymes with:
bedenbaugh, bridenbaugh, buterbaugh, butterbaugh, clabough, defenbaugh, deffenbaugh, grabau, heinbaugh, kishbaugh, redenbaugh, rodenbaugh, rohrbaugh, rohrbough, steinbaugh, strausbaugh, wiederaufbau
Umbaugh sounds like:
umbach, unambiguous, unbook, univisa, unpack