Here's what rhymes with atheniensium.
                        
                        
                    
                                lawrencium  Words that almost rhyme with atheniensium
millennium  gentium  requiem  barium  biennium  fermium  compendium  proscenium  honorarium  vivarium  lutetium  nobelium  aquarium  sanitarium  quadrennium  endometrium  technetium  planetarium