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