Here's what rhymes with perpetuatingly.
titillatingly deprecatingly irritatingly gratingly hesitatingly devastatingly penetratingly fascinatingly accommodatingly aggravatingly nauseatingly unhesitatingly illuminatingly intimidatingly calculatingly invigoratingly excruciatingly exasperatingly humiliatingly infuriatingly ingratiatingly Words that almost rhyme with perpetuatingly
ragingly engagingly amazingly basically persuasively unfailingly meditatively pervasively scathingly entertainingly imitatively rakishly piratically creatively evasively animatedly unavailingly abrasively jadedly authoritatively appreciatively collaboratively legislatively prosaically manipulatively qualitatively administratively algebraically exaggeratedly complicatedly lackadaisically uncomplainingly exasperatedly