Here's what rhymes with geotechnical.
                        
                        
                    
                                technical  nontechnical  pyrotechnical  Words that almost rhyme with geotechnical
lexical  testicle  identical  poetical  helical  metrical  vesicle  vesical  electrical  spherical  dialectical  heretical  unethical  angelical  theoretical  evangelical  geometrical  hysterical  symmetrical  biomedical  ecumenical  exegetical  indelible  academical  obstetrical  diametrical  hermetical  alphabetical  asymmetrical  antithetical  nonsensical  parenthetical  nonidentical  extendible  arithmetical  imperceptible  petrochemical  unsymmetrical  nonelectrical  electrochemical  hemispherical  infinitesimal  trigonometrical  incomprehensible