Here's what rhymes with castrantis.
                        
                        
                    
                                Words that almost rhyme with castrantis
aggregates  alkalis  passionless  metastasis  agonists  diaphanous  candlewicks  classicists  parodists  anatomists  panelists  pragmatists  evangelists  philanthropists  urinalysis  expansionists  mineralogists  somnambulists