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