Words That Rhyme With "Symposium" :

3 syllables:

caesium, cesium, Jovian

4 syllables:

Brundisium, dysprosium, Elysium, gymnasium, indusium, magnesium, Midlothian, Pavlovian, Thoreauvian

5 syllables:

horologium, neologian, philologian, theologian