Heighten rhymes with:
breighton, brighten, brighton, criton, enlighten, frighten, guyton, iten, knighten, knighton, lighten, litan, reitan, reiten, tighten, titan, triton, whiten
Heighten sounds like:
hasidim, hasten, haston, haughton, haxton, heaston, hechtman, hesitation, hesston, heston, higdon, histamine, histidine, hochstein, hogston, houghton, housden, houston, houstonian, hueston, hughston, hugoton, huston