Premillenial or Premillennial: How To spell?
The word Premillenial is misspelled against Premillennial, an adjective meaning "Previous to the millennium."
Premillennial has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings premille & ial which should not be misspelled with single 'N'
Wrong Spelling:  premille-n-ial  Correct Spelling:  premille-nn-ial 
Find more wrongly spelled words of Premillennial to spell it well.