There can be either two or three, depending on your pronunciation. Syllables depend on how you say a word. If you say dif-rent, then it has 2 syllables. If you say dif-er-ent, then it has 3. I would...
Polysyllable. Words with two or three syllables are called disyllables and trisyllables, respectively, though 'polysyllable' can be a word with two syllables or more. A word with multiple syllables...