Nonitrognous or Nonnitrognous: How To spell?
The word Nonitrognous is misspelled against Nonnitrognous, an adjective meaning "Devoid of nitrogen; as, a nonnitrogenous principle; a nonnitrogenous food. See the Note under Food, n., 1."
Nonnitrognous has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings no & itrognous which should not be misspelled with single 'N'
Wrong Spelling:  no-n-itrognous  Correct Spelling:  no-nn-itrognous 
Check more misspelled words of Nonnitrognous to spell it correct.