Here's what rhymes with estension.
                        
                        
                    
                                tension  pension  gentian  attention  mention  extension  dimension  retention  suspension  detention  dissension  ascension  distension  invention  prevention  contention  hypertension  pretension  declension  convention  apprehension  condescension  reinvention  reprehension  comprehension  misapprehension  incomprehension  Words that almost rhyme with estension
strengthen  lengthen  tendon  dentin  penman  pennon  direction  section  session  chairman  cession  ejection  pectin  beckon  deaden  freshen  destine  bellman  deafen  hessian  election  seven  heaven  intention  perception  possession  selection  affection  correction  detection  injection  inspection  lesson  objection  perfection  rejection  weapon  brethren  oppression  resurrection  suppression  threaten  deception  dissection  erection  insurrection  lemon  lessen  obsession  reckon  resin  secession  subjection  defection  freshman  dejection  distention  headman  leaden  leaven  melon  pepsin  abstention  felon  headmen  henchmen  heron  abjection  chevron  henchman  lepton  penguin  stepson  bisection  redden  subvention  vegan  indention  pressman  refection  hellion  question  expression  collection  connection  protection  depression  exception  impression  infection  intervention  profession  reflection  suggestion  aggression  eleven  rebellion  reception  succession  accession  connexion  intersection  intestine  procession  projection  redemption  repression  complexion  deflection  digestion  inception  recession  resection  imperfection  inflection  ingestion  intercession  digression  disaffection  inattention  dispossession  indirection  interception  preemption  redirection  reflexion  sexton  inflexion  interjection  hempen  headsman  kelvin  supervention  helpline  nelson  trisection  conception  compression  discretion  concession  confession  progression  recollection  regression  congestion  exemption  convection  introspection  indigestion  reelection  disconnection  confection  misdirection  retrospection  repossession  selectman  genuflection  gremlin  predilection  disinfection  indiscretion  interconnection  circumspection  watermelon  circumvention  concretion  reinfection  rhododendron  prepossession  contraception  misconception  transgression  contravention  decompression  retrogression  nonintervention  preconception  delicatessen  nonaggression  autosuggestion