Harker rhymes with:
barker, darker, marker, parker, polymarker, starker, barker, corker, darker, dierker, forker, forquer, kaercher, marker, millworker, new-yorker, parker, polymarker, porker, starker, yorker, zuercher
Harker sounds like:
hara-kiri, harasser, harcrow, harger, harriger, harsher, hershiser, herzer, horger