Extraxillary or Extraaxillary: How To spell?
The word Extraxillary is misspelled against Extraaxillary, an adjective meaning "Growing outside of the axils; as, an extra-axillary bud."
Extraaxillary has double "aa" is mispronounced as "a"Remember double 'AA' in between the strings Extr & xillary which should not be misspelled with single 'A'
Wrong Spelling:  Extr-a-xillary  Correct Spelling:  Extr-aa-xillary 
Find more wrongly spelled words of Extraaxillary to spell it well.