Octosyllabical :: Octosyllabical (a.) Consisting of or containing eight syllables.
Parisyllabical :: Parisyllabical (a.) Having the same number of syllables in all its inflections.
Polysyllabical :: Polysyllabical (a.) Pertaining to a polysyllable; containing, or characterized by, polysyllables; consisting of more than three syllables..
Quadri-syllabical :: Quadri-syllabical () Having four syllables; of or pertaining to quadrisyllables; as, a quadrisyllabic word..