Competitions rhymes with:
competition's, competition's, competition's, competition's, petitions, repetitions, competition's, dietitian's, dietitians, mathematicians, petitions, politician's, politicians, politicians', repetitions, theoreticians
Competitions sounds like:
cambodians, combating, combatting, competence, competencies, competency, competing, competition's, compton's, computations, computing, confidence, confidence's, confidences, confiding