Apendixes or Appendixes: How To spell?
The word Apendixes is misspelled against Appendixes, which is plural of "Appendix"
Appendixes has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings a & endixes which should not be misspelled with single 'P'
Wrong Spelling:  a-p-endixes  Correct Spelling:  a-pp-endixes 
Find more wrongly spelled words of Appendixes to spell it well.