Here's what rhymes with commoncement.
                        
                        
                    
                                Words that almost rhyme with commoncement
dominant  armament  commonest  prominent  continent  communist  complement  consonant  ornament  nominate  condiment  oftenest  augustest  argument  opposite  confident  parliament  consequent  consummate  occupant  apportionment  botanist  cognizant  columnist  opulent  organist  protestant  rearmament  oxidant  somnolent  arsonist  rottenest  uncommonest  fortunate  coordinate  predominant  concomitant  fraudulent  incompetent  novelist  obstinate  disarmament  consulate  oxalate  corpulent  formalist  incontinent  congregant  psychologist  bicarbonate  populist  proximate  biologist  geologist  apologist  reapportionment  zoologist  urologist  ethologist  gemologist  gemmologist  unfortunate  approximate  monopolist  pathologist  neurologist  extortionate  ideologist  anthologist  gynaecologist  contortionist  cosmologist  graphologist  proportionate  antioxidant  gynecologist  phrenologist  seismologist  escapologist  entomologist  musicologist  embryologist  violoncellist  futurologist  anthropologist  bacteriologist  parapsychologist  endocrinologist  anesthesiologist  anaesthesiologist