Clasicism or Classicism: How To spell?
The word Clasicism is misspelled against Classicism, a noun meaning "A classic idiom or expression; a classicalism."
Classicism has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings cla & icism which should not be misspelled with single 'S'
Wrong Spelling:  cla-s-icism  Correct Spelling:  cla-ss-icism 
Find more wrongly spelled words of Classicism to spell it well.