Here's what rhymes with oppugnandam.
                        
                        
                    
                                dam  damn  jam  tam  jamb  lamb  cam  ham  ram  sham  lam  nam  tram  dram  yam  pram  spam  wham  gram  swam  clam  slam  cram  gramme  quondam  scam  cofferdam  glam  grandam  flambe  exam  anagram  buckram  doorjamb  scram  diagram  diaphragm  epigram  kilogram  milligram  monogram  mammogram  sonogram  telegram  diazepam  hologram  cablegram  ideogram  pentagram  centigram  kissogram  histogram  hexagram  radiogram  cardiogram  parallelogram  electrocardiogram  electroencephalogram  Words that almost rhyme with oppugnandam
ban  pan  tan  bang  dan  pang  tang  chang  dann  dang  can  than  man  plan  ran  van  hang  fan  gang  rang  sang  span  shan  yang  bran  kan  kann  lang  langue  nan  san  fang  gan  lan  prang  began  clan  scan  sprang  slang  gran  harangue  sedan  clang  divan  rattan  cyan  flan  japan  outran  saran  shebang  boomerang  catamaran  minivan  minuteman  rehang  whizzbang  caravan  journeyman  middleman  overhang  overran  handyman  nurseryman  anchorman  bogeyman  turbofan  counterman  paperhanger  boogeyman  orangutang  businessman  fisherman  assemblyman  serviceman  radioman  weatherman  newspaperman  pleonasm