Coperplate or Copperplate: How To spell?
The word Coperplate is misspelled against Copperplate, a noun meaning "A plate of polished copper on which a design or writing is engraved."
Copperplate has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings co & erplate which should not be misspelled with single 'P'
Wrong Spelling:  co-p-erplate  Correct Spelling:  co-pp-erplate 
Find more incorrect spellings of Copperplate to spell right way.