Nitrous rhymes with:
citrus, actress, ambidextrous, beatrice, buttress, citrus, dextrous, disastrous, estrous, estrus, fortress, headmistress, idolatrous, kontras, lustrous, mattress, mistress, monstrous, peatross, petrus, sentras, waitress, watrous
Nitrous sounds like:
nader's, nature's, natures, nethers, network, network's, networks, networks', nitric, notorious