Anumeration or Annumeration: How To spell?
The word Anumeration is misspelled against Annumeration, a noun meaning "Addition to a former number."
Annumeration has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings a & umeration which should not be misspelled with single 'N'
Wrong Spelling:  a-n-umeration  Correct Spelling:  a-nn-umeration 
Check more misspelled words of Annumeration to spell it correct.