Asibilation or Assibilation: How To spell?
The word Asibilation is misspelled against Assibilation, a noun meaning "Change of a non-sibilant letter to a sibilant, as of -tion to -shun, duke to ditch."
Assibilation has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & ibilation which should not be misspelled with single 'S'
Wrong Spelling:  a-s-ibilation  Correct Spelling:  a-ss-ibilation 
Find more incorrect spellings of Assibilation to spell right way.