Penaceous or Pennaceous: How To spell?
The word Penaceous is misspelled against Pennaceous, an adjective meaning "Like or pertaining to a normal feather."
Pennaceous has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings pe & aceous which should not be misspelled with single 'N'
Wrong Spelling:  pe-n-aceous  Correct Spelling:  pe-nn-aceous 
Check more misspelled words of Pennaceous to spell it correct.