Here's what rhymes with gabapentin.
                        
                        
                    
                                lenten  Words that almost rhyme with gabapentin
denting  tenting  bending  tending  pending  renting  venting  scenting  absenting  benching  upending  depending  attending  sending  spending  lending  blending  dissenting  mending  rending  drenching  trending  vending  wrenching  appending  assenting  fending  repenting  trenching  wending  indenting  subtending  presenting  ascending  defending  descending  preventing  impending  intending  offending  pretending  amending  inventing  avenging  lamenting  orienting  quenching  unending  cementing  clenching  fermenting  resenting  unbending  contenting  relenting  distending  portending  emending  extending  contending  apprehending  condescending  consenting  suspending  transcending  unrelenting  commending  complementing  expending  complimenting  entrenching  heartrending  befriending  revenging  intrenching  retrenching  regimenting  representing  implementing  comprehending  circumventing  reinventing  disorienting  ornamenting  reorienting  overspending  experimenting  recommending  superintending  uncomprehending  overextending  misrepresenting  chairmen  chessmen  rennin  hairpin  pressmen  welkin  clandestine  freshmen  ephedrine  redskin  selectmen  epinephrin  moleskin  helmsmen  snakeskin  mujahedin  clothespin