Here's what rhymes with pontaneous.
spontaneous cutaneous simultaneous miscellaneous extraneous percutaneous subcutaneous contemporaneous extemporaneous Words that almost rhyme with pontaneous
manias macadamias radius daintiness patriots radiance laziness salience haziness raciness shakiness shadiness tastiness pastiness spaciness vagarious irradiance craziness saintliness hastiness salients flakiness ungainliness gradients compatriots neighborliness bacchanalias leisureliness