Here's what rhymes with similtaneous.
simultaneous cutaneous spontaneous miscellaneous extraneous percutaneous subcutaneous extemporaneous contemporaneous Words that almost rhyme with similtaneous
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