Headmistress rhymes with:
ambidextrous, dextrous, disastrous, estrous, estrus, lustrous, mistress, monstrous, actress, ambidextrous, beatrice, buttress, citrus, dextrous, disastrous, estrous, estrus, fortress, idolatrous, kontras, lustrous, mattress, mistress, monstrous, nitrous, peatross, petrus, sentras, waitress, watrous