Harkness rhymes with:
darkness, darkness, blackness, bleakness, darkness, frankness, hawkiness, homesickness, likeness, preakness, quickness, sickness, slackness, thickness, uniqueness, weakness
Harkness sounds like:
harassing, hargens, harkin's, harking, harkins, harrison's, harshness, hearkens, herzing, hirosakamoki, hoarseness, horizon's, horizons, horsham's, horsing, hurricane's, hurricanes