Secesionism or Secessionism: How To spell?
The word Secesionism is misspelled against Secessionism, a noun meaning "The doctrine or policy of secession; the tenets of secession; the tenets of secessionists."
Secessionism has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings sece & ionism which should not be misspelled with single 'S'
Wrong Spelling:  sece-s-ionism  Correct Spelling:  sece-ss-ionism 
Find more incorrect spellings of Secessionism to spell right way.