Boston's rhymes with:
austin's, jostens, austin's, boyleston's, boylston's, carstens, charleston's, cranston's, gaston's, hesston's, houston's, intestines, johnston's, jostens, justin's, karstens, livingston's, pistons, preston's, princeton's, ralston's, thaxton's
Boston's sounds like:
babysitting, backdating, bagdonas, basting, bastions, begetting, besetting, besting, bestowing, biosystems, boasting, bogdanowicz, bogdanski, boosting, bostonians, boycotting, busting