Tricenial or Tricennial: How To spell?

The word Tricenial is misspelled against Tricennial, an adjective meaning "pertaining to thirty years; consisting thirty years; occurring once in every thirty years."

Tricennial has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings trice & ial which should not be misspelled with single 'N'
Wrong Spelling: trice-n-ial
Correct Spelling: trice-nn-ial
Find more wrongly spelled words of Tricennial to spell it well.