Asimulation or Assimulation: How To spell?
The word Asimulation is misspelled against Assimulation, a noun meaning "Assimilation."
Assimulation has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & imulation which should not be misspelled with single 'S'
Wrong Spelling:  a-s-imulation  Correct Spelling:  a-ss-imulation 
Check more misspelled words of Assimulation to spell it correct.