Here's what rhymes with plegmonous.
                        
                        
                    
                                bonus  lowness  coronas  slowness  cacophonous  Words that almost rhyme with plegmonous
kimonos  donas  aromas  comas  lymphomas  gliomas  dichotomous  diplomas  sarcomas  carcinomas  granulomas  hematomas  notice  modus  focus  locus  prognosis  lotus  bogus  bolus  foetus  meiosis  polis  precocious  doughnuts  loess  nobleness  poetess  ptosis  boneless  crocus  grownups  donuts  toneless  bolas  colas  hotness  togas  goalless  cloacas  diagnosis  poets  hopeless  homeless  boldness  cirrhosis  coldness  ferocious  hostess  hypnosis  neurosis  mitosis  remoteness  embolus  poultice  proneness  soulless  cupolas  smokeless  kopeks  roebucks  cosmoses  drollness  components  moments  opponents  necrosis  sclerosis  atrocious  exponents  psychosis  rodents  cyanosis  locusts  condolence  quotients  refocus  holdups  weaponless  blowups  docents  snowbanks  pianolas  fibrosis  proponents  thrombosis  acidosis  scoliosis  symbiosis  misdiagnosis  deponents  gladiolus  foments  sobriquets  violists  apoptosis  encroachments  apotheosis  arteriosus  enrollments  amyloidosis  aponeurosis  leukocytosis  sarcoidosis  enrolments  psychoneurosis  halitosis  elopements  cosmogonists  enthronements  erythematosus  phagocytosis  hydronephrosis  postponements  chiropodists  honeylocusts  metempsychosis  arteriosclerosis  mononucleosis