Cachination or Cachinnation: How To spell?
The word Cachination is misspelled against Cachinnation, a noun meaning "Loud or immoderate laughter; -- often a symptom of hysterical or maniacal affections."
Cachinnation has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings cachi & ation which should not be misspelled with single 'N'
Wrong Spelling:  cachi-n-ation  Correct Spelling:  cachi-nn-ation 
Find more incorrect spellings of Cachinnation to spell right way.