Decenovary or Decennovary: How To spell?
The word Decenovary is misspelled against Decennovary, an adjective meaning "Pertaining to the number nineteen; of nineteen years."
Decennovary has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings dece & ovary which should not be misspelled with single 'N'
Wrong Spelling:  dece-n-ovary  Correct Spelling:  dece-nn-ovary 
Find more incorrect spellings of Decennovary to spell right way.