Rubicon rhymes with:
absecon, recon, absecon, acetosyringone, alteon, bergeron, calgon, crampon, decathlon, delaune, devaughn, doggone, einon, haton, incheon, inchon, jumbotron, kirwan, lieson, malathion, mouton, papon, ptyon, recon, savion, savon, scaleatron, sephlon, styron, suon, teason
Rubicon sounds like:
rabkin, rapkin, rapson, repossession, revision, revson, revzin, rifkin, riphagen, ripken, ripkin, rivkin, robeson, robison, robson, rubicam