Expounded rhymes with:
compounded, propounded, bounded, compounded, founded, propounded, rounded, sounded, surrounded, absconded, amended, apprehended, ascended, attended, backhanded, blended, bonded, bounded, candid, commanded, compounded, defended, demanded, depended, descended, ended, expanded, extended, founded, funded, handed, intended, landed, minded, offended, overextended, pretended, propounded, recommended, red-handed, reminded, rounded, sounded, splendid, stranded, surrounded, suspended, tended, wounded
Expounded sounds like:
equipment, escapement, expand, expanded, expend, expended, exponent, expound