Petunias rhymes with:
albania's, armenia's, bosnia's, bosnias, chechnya's, corneas, eugenia's, hibernia's, lithuania's, lusitania's, lusitanias, romania's, tanzania's, zinnias
Petunias sounds like:
padding, pathans, patience, patons, patten's, patting, patton's, petitioning, petitions, pettiness, petting, photodynamic, photons, pittance, pitting, pitying, pivoting, podiums, podunk, potency, potenza, potions, potomac, pouting, ptomaines, pudding, puddings, pudong, put-ons, putdowns, putnam's, putting, puttnam's, python's