Here's what rhymes with suppositionis.
                        
                        
                    
                                Words that almost rhyme with suppositionis
viciousness  officiousness  auspiciousness  perniciousness  syphilis  deliciousness  judiciousness  bishoprics  capriciousness  singlets  ricochets  injudiciousness  photosynthesis  chrysalis  ringlets  dissidence  crystallise  hypnotists  revisionists  nutritionists  archbishoprics  empiricists  recrystallise  ventriloquists