Here's what rhymes with immemoriably.
                        
                        
                    
                                Words that almost rhyme with immemoriably
immemorially  notoriously  gloriously  laboriously  editorially  ingloriously  meritoriously  sartorially  pictorially  victoriously  dictatorially  euphoniously  multifariously  vaingloriously  professorially  conspiratorially  proprietorially