Rigatoni rhymes with:
antone, antoni, bartone, battistoni, bellantoni, bertone, bertoni, bottone, buitoni, cantone, cottone, dantoni, martone, montone, santone, santoni, stoney, stony, toney, toni, tonie, tony
Rigatoni sounds like:
ragtime, reaction, recitation, recoton, rectum, rejection, requisition, restaino, restitution, reston, resuscitation, ricadonna, richstone, richton, rigdon, risden, risdon, riston, rocketdyne, rosten, roston, roughton, royston, rushton, rustin, ruston