Here's what rhymes with synergesis.
                        
                        
                    
                                exegesis  amniocentesis  Words that almost rhyme with synergesis
ceases  adhesive  leases  brevis  cheeses  nieces  peevish  teases  appeases  pleases  breezes  seizes  creases  fleeces  greases  polices  thievish  leashes  deceases  quiches  releases  cohesive  freezes  friezes  sneezes  unleashes  sleazes  surceases  squeezes  nonadhesive  unfreezes  displeases  predeceases  grandnieces  refreezes  amniocenteses  penis  delis  chichis  ceaseless  regis  leanness  peewits  midis  helix  phoenix  deists  beatniks  fiats  gaudiness  dashikis  anapaestics  manginess  reedits  precincts  prefix  idealists  realists  uncleanness  seamstress  cleanness  machinists  sleeveless  theatrics  strategics  refits  styptics  floweriness  wateriness  reships  analgesics  surrealists  orthopedics  elitists  amnesics  defeatists  leukemics  unwariness  hygienists  orthopaedics  trusteeships  pointillists  pantomimists  quadriplegics  hypoglycemics