Here's what rhymes with beneficial.
                        
                        
                    
                                official  unofficial  initial  interstitial  artificial  judicial  superficial  prejudicial  nonofficial  semiofficial  sacrificial  nonjudicial  nonprejudicial  extrajudicial  Words that almost rhyme with beneficial
civil  thistle  fissile  sisal  sizzle  fizzle  missile  whistle  chisel  swivel  missal  shrivel  uncivil  riffle  sniffle  piffle  frizzle  skiffle  epistle  bristle  drizzle  drivel  gristle  grizzle  dismissal  gingival  bellyful  antimissile  fiddle  sickle  fickle  vigil  virile  chiral  sibyl  little  middle  simple  single  signal  symbol  fiscal  fearful  nickel  sinful  nipple  riddle  ripple  fitful  shingle  wishful  giggle  nibble  pickle  thimble  tickle  tittle  cymbal  spittle  wiggle  wriggle  diddle  hymnal  stipple  tipple  whittle  chicle  jiggle  dibble  kibble  skittle  niggle  piddle  provincial  cheerful  distal  brittle  dismal  pistol  spindle  triple  mingle  pixel  skillful  wilful  acquittal  cripple  kindle  nimble  tearful  trickle  willful  abysmal  committal  jingle  lintel  quibble  scribble  swindle  tingle  tinkle  tinsel  wrinkle  dimple  dribble  griddle  pistil  fistful  pimple  prickle  dingle  twiddle  wimple  megacycle  miscall  schnitzel  squiggle  winkle  dirndl  skinful  crystal  familial  ventricle  lingual  pedicle  sprinkle  twinkle  wistful  belittle  dwindle  liminal  intermingle  brimful  brindle  commingle  crinkle  mistral  timbrel  unskillful  vendible  oversimple  pumpernickel  surcingle  basinful  brimfull  participle  baptismal  blissful  minstrel  paroxysmal  noncommittal  rekindle  transmittal  periwinkle  bilingual  monolingual  multilingual  sublingual  cataclysmal