Tanin or Tannin: How To spell?
The word Tanin is misspelled against Tannin, a noun meaning "Same as Tannic acid, under Tannic."
Tannin has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings ta & in which should not be misspelled with single 'N'
Wrong Spelling:  ta-n-in  Correct Spelling:  ta-nn-in 
Find more wrongly spelled words of Tannin to spell it well.