Here's what rhymes with additionnant.
                        
                        
                    
                                Words that almost rhyme with additionnant
dissonant  militant  vigilant  virulent  sycophant  timpanist  difficult  ambivalent  omnipotent  silicate  stimulant  abolitionist  visitant  exhibitionist  littlest  prohibitionist  nimblest  cheerfullest  coalitionist  ficklest  legitimate  participant  coincident  particulate  simulate  discriminant  empiricist  militarist  precipitant  belittlement  ministrant  nonvirulent  nonmilitant  equivalent  magnificent  imprisonment  grandiloquent  dissimulate  inarticulate  individuate  gesticulate  indiscriminate  nonequivalent  nonparticipant