Here's what rhymes with nigricollis.
                        
                        
                    
                                raviolis  Words that almost rhyme with nigricollis
wholeness  nobis  yogis  closeness  aerobics  prolix  phobics  crochets  jocoseness  osmosis  heroics  narcosis  moroseness  stoics  biopics  macaronis  alkalosis  folklorists  bobolinks  bowsprits  postscripts  agoraphobics  myxomatosis  tuberculosis  telephonists  trombonists  xylophonists  atherosclerosis  osteoporosis  endometriosis  saxophonists  vibraphonists  toxoplasmosis