Comaterial or Commaterial: How To spell?
The word Comaterial is misspelled against Commaterial, an adjective meaning "Consisting of the same material."
Commaterial has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings co & aterial which should not be misspelled with single 'M'
Wrong Spelling:  co-m-aterial  Correct Spelling:  co-mm-aterial 
Find more incorrect spellings of Commaterial to spell right way.