Here's what rhymes with alkyltrimethylammonium.
                        
                        
                    
                                ammonium  meconium  harmonium  plutonium  zirconium  polonium  pandemonium  Words that almost rhyme with alkyltrimethylammonium
chromium  amazonian  draconian  sodium  podium  linoleum  niobium  rhodium  europium  holmium  symposium  petroleum  opprobrium  colloquium  dysprosium