Rigadon or Rigadoon: How To spell?
The word Rigadon is misspelled against Rigadoon, a noun meaning "A gay, lively dance for one couple, -- said to have been borrowed from Provence in France."
Rigadoon has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings rigad & n which should not be misspelled with single 'O'
Wrong Spelling:  rigad-o-n  Correct Spelling:  rigad-oo-n 
Find more incorrect spellings of Rigadoon to spell right way.