Argonaut rhymes with:
cosmonaut, cosmonaut, dreadnought, juggernaut, boursicot, cosmonaut, dreadnought, forethought, juggernaut, onslaught
Argonaut sounds like:
aerosmith, arachnid, arcand, arcement, arcosanti, argent, argenta, argento, argument, arizmendi, arraigned, arraignment, arrasmith, arrogant, arrowsmith, arsenide