Words That Rhyme With "Gymnasium" :
3 syllables:
avian, caesium, cesium, Jamesian, Keynesian, Magian, Schlesien, Shavian
4 syllables:
Brundisium, dichasium, Elysium, indusium, Moldavian, Moravian, oasean, Octavian, patagium, Pegasian, subclavian, symposium, trapezium, Vespasian