The word "balloon" is often misspelled as "balloen". The correct spelling is with two "o"s, not "oe". The IPA phonetic transcription for "balloon" is /bəˈluːn/. The first syllable is pronounced with a short "u" sound as in "but". The second syllable has a long "oo" sound as in "blue". Remembering the correct spelling of "balloon" will help avoid misspellings in written communication.