Dumy or Dummy: How To spell?
The word Dumy is misspelled against Dummy, a noun meaning "A floating barge connected with a pier."
Dummy has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings du & y which should not be misspelled with single 'M'
Wrong Spelling:  du-m-y  Correct Spelling:  du-mm-y 
Check more misspelled words of Dummy to spell it correct.