Argument's rhymes with:
arguments, arguments, arguments, arguments, documents, monuments, arguments, armaments, complements, condiments, documents, elements, experiment's, experiments, filaments, impediments, implements, increments, instrument's, instruments, instruments', ligaments, monuments, ornaments, parliament's, parliaments, predicaments, regiments, sacraments, sediments, sentiments, supplements, temperaments, tenements, testaments, tournament's, tournaments
Argument's sounds like:
aerosmith's, arachnids, archimedes, argonaut's, argonauts, arguments, arraignments, arrowsmith's