Here's what rhymes with ooservations.
                        
                        
                    
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hastens  havens  occasions  patience  basins  masons  raisins  evasions  ravens  invasions  persuasions  abrasions  equations  impatience  complaisance  shamans  fables  maidens  awakens  faces  pages  stages  tables  wages  phases  labels  cables  patrons  stables  vases  gauges  staples  gables  gages  hatreds  maples  matrons  cases  changes  bases  enables  phrases  races  ranges  spaces  raises  gazes  laces  chases  cradles  places  traces  praises  appraisals  braces  glazes  exchanges  fireplaces  metastases  portrayals  paraphrases