Septenate or Septennate: How To spell?
The word Septenate is misspelled against Septennate, a noun meaning "A period of seven years; as, the septennate during which the President of the French Republic holds office."
Septennate has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings septe & ate which should not be misspelled with single 'N'
Wrong Spelling:  septe-n-ate  Correct Spelling:  septe-nn-ate 
Explore spell check of Septennate to spell without errors.