Here's what rhymes with semion.
                        
                        
                    
                                Words that almost rhyme with semion
biennium  millennium  proscenium  quadrennium  ovarian  carrion  ferryman  ferrymen  thespian  lesbian  clarion  agrarian  sectarian  chameleon  vestrymen  vestryman  vulgarian  librarian  barbarian  vegetarian  sanitarian  seminarian  cnidarian  authoritarian  pedestrian  equestrian  libertarian  veterinarian  centenarian  egalitarian  proletarian  antiquarian  trinitarian  nonsectarian  humanitarian  utilitarian  totalitarian  disciplinarian  octogenarian  nonagenarian  sexagenarian  communitarian  septuagenarian  valetudinarian  parliamentarian  latitudinarian