Pentagonaly or Pentagonally: How To spell?
The word Pentagonaly is misspelled against Pentagonally, an adverb meaning "In the form of a pentagon; with five angles."
Pentagonally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings pentagona & y which should not be misspelled with single 'L'
Wrong Spelling:  pentagona-l-y  Correct Spelling:  pentagona-ll-y 
Find more incorrect spellings of Pentagonally to spell right way.