Subapenine or Subapennine: How To spell?
The word Subapenine is misspelled against Subapennine, an adjective meaning "Under, or at the foot of, the Apennine mountains; -- applied, in geology, to a series of Tertiary strata of the older Pliocene period."
Subapennine has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings subape & ine which should not be misspelled with single 'N'
Wrong Spelling:  subape-n-ine  Correct Spelling:  subape-nn-ine 
Check more misspelled words of Subapennine to spell it correct.