Millenist or Millennist: How To spell?
The word Millenist is misspelled against Millennist, a noun meaning "One who believes in the millennium."
Millennist has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings mille & ist which should not be misspelled with single 'N'
Wrong Spelling:  mille-n-ist  Correct Spelling:  mille-nn-ist 
Find more wrongly spelled words of Millennist to spell it well.