Here's what rhymes with hydrographical.
                        
                        
                    
                                graphical  geographical  biographical  topographical  typographical  autobiographical  bibliographical  historiographical  lexicographical  Words that almost rhyme with hydrographical
classical  fascicle  neoclassical  magical  tragical  pragmatical  mechanical  tactical  tyrannical  capitol  mannitol  theatrical  botanical  dynamical  fanatical  fanciful  irascible  sabbatical  satanical  problematical  biomechanical  fantastical  puritanical  monastical  ecclesiastical  mathematical  systematical  expansible  contractible  nontheatrical  electromechanical