Misionary or Missionary: How To spell?
The word Misionary is misspelled against Missionary, a noun meaning "One who is sent on a mission; especially, one sent to propagate religion."
Missionary has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings mi & ionary which should not be misspelled with single 'S'
Wrong Spelling:  mi-s-ionary  Correct Spelling:  mi-ss-ionary 
Find more incorrect spellings of Missionary to spell right way.