Here's what rhymes with downily.
                        
                        
                    
                                Words that almost rhyme with downily
dowdily  bouncily  doubtfully  drowsily  bounteously  rowdily  lousily  doubtlessly  boundlessly  frowsily  frowzily  avowedly  soundlessly  allowably  redoubtably  accountancy  groundlessly  unaccountably  insurmountably