Erno rhymes with:
paterno, salerno, verno, acierno, adorno, arno, arnow, barno, bongiorno, delgiorno, furno, garno, karnow, letourneau, nagorno, paterno, porno, salerno, sarno, sukarno, tarnow, tierno, torno, tornow, verno, warno
Erno sounds like:
earn, earney, ehren, ehrman, ehrmann, eiermann, eirena, eramo, erany, erawan, erena, erin, erina, erion, erma, erman, ermin, ermina, ermine, erminia, erminie, erna, erne, erney, ernie, erny, eron, erwin, erwina, euromoney, euroyen, eyerman