Here's what rhymes with retroflexive.
                        
                        
                    
                                reflexive  Words that almost rhyme with retroflexive
flexes  lexis  vexes  hexes  triplexes  duplexes  perplexes  multiplexes  selective  elective  reflective  pensive  restive  effective  collective  aggressive  offensive  progressive  respective  prospective  affective  corrective  directive  oppressive  retrospective  festive  recessive  repressive  regressive  suppressive  retrogressive  deflective  unoffensive  extensive  objective  perspective  excessive  expensive  impressive  intensive  protective  subjective  successive  defective  defensive  expressive  attentive  connective  depressive  detective  irrespective  preventive  receptive  apprehensive  infective  obsessive  possessive  introspective  invective  projective  retentive  transgressive  digressive  overaggressive  incentive  suggestive  digestive  ineffective  inexpensive  compressive  deceptive  hypertensive  inventive  perceptive  convective  inoffensive  redemptive  coextensive  hypotensive  preemptive  inexpressive  overattentive  comprehensive  congestive  inattentive  counteroffensive  unimpressive  imperceptive  noneffective  contraceptive  immunosuppressive  intersubjective  proprioceptive  disincentive  nonobjective  unperceptive  nonsuccessive  antihypertensive