Here's what rhymes with effervescent.
                        
                        
                    
                                evanescent  senescent  incessant  crescent  iridescent  suppressant  adolescent  fluorescent  quiescent  phosphorescent  obsolescent  opalescent  coalescent  convalescent  incandescent  depressant  pubescent  acquiescent  luminescent  putrescent  prepubescent  antidepressant  Words that almost rhyme with effervescent
pheasant  peasant  lessened  present  pleasant  deafened  freshened  leavened  unpleasant  omnipresent  assessment  apparent  parent  segment  tenant  senate  aberrant  ascendant  ferret  pennant  sextant  vestment  zealot  amercement  ascendent  merit  attendant  helmet  remnant  sentenced  velvet  appellant  chestnut  parrot  pendant  despot  legate  menaced  merest  pellet  penchant  rarest  reassessment  tenet  terraced  barest  haircut  beret  carat  clement  densest  rennet  cellist  regnant  wettest  inerrant  karat  scarcest  developed  credit  investment  amendment  defendant  pregnant  commencement  lieutenant  dentist  descendant  inherit  enveloped  refreshment  tempest  premised  repellent  catgut  propellant  trenchant  contestant  descendent  freshest  accredit  divestment  repellant  revetment  stepparent  godparent  dependent  breakfast  embarrassed  impairment  resentment  transparent  temperate  template  transcendent  expectant  apprenticed  dependant  inclement  prefaced  repentant  demerit  cruellest  intensest  librettist  enmeshment  independent  contentment  discredit  undeveloped  disinfectant  presentment  resplendent  entrenchment  reinvestment  barefaced  biochemist  disinvestment  disinherit  overdeveloped  redeveloped  unembarrassed  decongestant  superintendent  underdeveloped  interdependent  retrenchment  unrepentant  discontentment  intrenchment  codependent  semitransparent