Here's what rhymes with fnctional.
                        
                        
                    
                                funnel  tunnel  tional  runnel  gunnel  heptagonal  Words that almost rhyme with fnctional
pummel  tamale  suboptimal  duodecimal  subtle  shovel  shuttle  shuffle  suppl  supple  hovel  huddle  hustle  suckle  appal  uncial  fuddle  awol  double  couple  muscle  humble  uncle  bundle  frontal  bubble  puzzle  bustle  fungal  muzzle  rubble  buckle  chuckle  muddle  puddle  rustle  stubble  knuckle  muffle  mussel  publ  ruffle  scuffle  scuttle  smuggle  subtile  tuple  cuddle  cudgel  fumble  juggle  phrasal  tussle  caecal  rappel  snaffle  snuggle  guzzle  nuzzle  umbel  snuffle  tousle  kerfuffle  struggle  trouble  jungle  tumble  autumnal  crumble  crustal  ductile  jumble  nuptial  rumble  stumble  ductal  friable  grumble  honeysuckle  mumble  pustule  bumble  crumple  reshuffle  truffle  trundle  bungle  playable  truckle  uncouple  vocable  befuddle  duckbill  lungful  nonvocal  rumple  acquirable  flyable  gumball  jugful  tubful  vincible  mugful  addable  colourful  rebuttal  bestowal  conformal  lustful  thermocouple  dirigible  redouble  decouple  nonviable  unbuckle  unplayable  tumbrel  beatable  oversubtle  tamable  unloveable  cupsful  pinocle  triumphal  conformable  prefrontal  antifungal  damnable  peduncle  carbuncle  trustful  attachable  filtrable  unnameable  ignitable  unlikable  dividable  disgruntle  imperishable  subcortical  uncharitable  exploitable  mistrustful  unbridgeable  prenuptial  unarguable  containable  granduncle  distrustful  imperturbable  indissoluble  compoundable  translatable  transmutable  untranslatable  indemonstrable