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