Argon rhymes with:
argonne, argonne, aragon, argonne, hexagon, hogan, octagon, paragon, pentagon, polygon
Argon sounds like:
aragon, aragona, arcana, arcane, arcanum, archenemy, argonne, arisen, arison, arizona, arizonan, arkin, arraign, arreguin, arrigoni, arseneau, arsenio, arson, arzama