Ballonry or Balloonry: How To spell?
The word Ballonry is misspelled against Balloonry, a noun meaning "The art or practice of ascending in a balloon; aeronautics."
Balloonry has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings ball & nry which should not be misspelled with single 'O'
Wrong Spelling:  ball-o-nry  Correct Spelling:  ball-oo-nry 
Find more incorrect spellings of Balloonry to spell right way.