polysyllable

/ˈpɑliˌsɪləbəl/
noun
  1. A word that has more than one syllable.
    • The teacher asked the class to list five polysyllables from the poem.
    • "Elephant" is a polysyllable with three syllables.
    • Young children often find it hard to pronounce long polysyllables.
Antonyms