Petitions rhymes with:
competition's, competitions, repetitions, competition's, competitions, dietitian's, dietitians, mathematicians, politician's, politicians, politicians', repetitions, theoreticians
Petitions sounds like:
padding, pathans, patience, patons, patten's, patting, patton's, petitioning, pettiness, petting, petunias, 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