Words That Rhyme With "Monotonous" :
3 syllables:
chitinous, glutenous, glutinous, gluttonous, mateyness, meatiness, mutinous, patinous, pettiness, platinous, prytanis, rottenness, tetanus, wantonness
4 syllables:
dichotomous, gelatinous, homogonous, hypotenuse, keratinous, phototonus, physostomous, schizogonous, serotinous, velutinous, xylotomous