Canadians' rhymes with:
canadian's, canadians, canadian's, canadians, canadian's, canadians, arcadians, canadian's, canadians, accordions, arcadians, burgundians, cambodians, canadian's, canadians, comedian's, comedians, custodians, davidian's, davidians, didion's, floridians, guardian's, guardians, indian's, indians, indians', meridian's
Canadians' sounds like:
camden's, canadian's, canadians, canteens, cantonese, cantons, cementing, centimes, chanting, chintung, comedian's, comedians, commanding, commending, commenting, committing, commuting, condemning, condemns, condense, conditioning, conditions, condominiums, condoms, condones, condoning, connotations, containing, contains, continuance, continuances, continues, continuing, continuous, countdowns, countenance, countenances, counting