Here's what rhymes with lydium.
                        
                        
                    
                                idiom  iridium  presidium  praesidium  Words that almost rhyme with lydium
tritium  meridian  obsidian  amphibian  postmeridian  lithium  ilium  indium  yttrium  trivium  trillium  delirium  wearisome  beryllium  bacterium  equilibrium  condominium  disequilibrium