Here's what rhymes with underemphasis.
                        
                        
                    
                                overemphasis  Words that almost rhyme with underemphasis
genesis  beneficence  tremulous  perilous  stenosis  carelessness  mellitus  membranous  precipice  tetanus  nebulous  recklessness  venomous  garrulous  breathlessness  carefulness  preciousness  sedulous  dreadfulness  fecklessness  testiness  mechanise  djellabas  marabous  jellabas  heftiness  negligence  prevalence  resonance  benevolence  feminists  precedence  decadence  helplessness  pathogenesis  pestilence  restlessness  sensuous  tenuous  asparagus  blessedness  credulous  preeminence  angiogenesis  geneticists  helpfulness  pendulous  querulous  emeritus  petulance  baronets  fretfulness  healthfulness  senselessness  directionless  megabits  restfulness  decimates  levelness  redolence  tepidness  fetidness  zestfulness  regiments  relevance  precedents  sediments  gentleness  tenements  incredulous  requisites  temperaments  unpleasantness  embryogenesis  malevolence  morphogenesis  pleasantness  clarinets  testaments  decadents  detriments  defencelessness  defenselessness  impetuousness  momentousness  terribleness  contemptuousness  eventfulness  nonvenomous  tempestuousness  housemistress  dextrousness  intelligence  inheritance  sentiments  settlements  specialists  forgetfulness  hydrocephalus  licentiousness  preparedness  conscientiousness  irrelevance  spermatogenesis  registrants  celebrants  interrogates  pretentiousness  unpreparedness  contentiousness  infectiousness  perfectionists  relentlessness  tendentiousness  portentousness  resentfulness  sensibleness  incestuousness  neglectfulness  developments  impediments  embarrassments  prerequisites  integuments  nonresidents  nonspecialists  respectfulness  secondments  experiments  presentiments  disinheritance  gluconeogenesis  redevelopments