Comonplaceness or Commonplaceness: How To spell?
The word Comonplaceness is misspelled against Commonplaceness, a noun meaning "The quality of being commonplace; commonness."
Commonplaceness has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings co & onplaceness which should not be misspelled with single 'M'
Wrong Spelling:  co-m-onplaceness  Correct Spelling:  co-mm-onplaceness 
Find more incorrect spellings of Commonplaceness to spell right way.