Contemptuous rhymes with:
tempestuous, tumultuous, virtuous, ambiguous, arduous, conspicuous, contiguous, continuous, deciduous, disingenuous, incongruous, ingenuous, innocuous, strenuous, tempestuous, tumultuous, vacuous, virtuous
tempestuous, tumultuous, virtuous, ambiguous, arduous, conspicuous, contiguous, continuous, deciduous, disingenuous, incongruous, ingenuous, innocuous, strenuous, tempestuous, tumultuous, vacuous, virtuous