Coroboration or Corroboration: How To spell?
The word Coroboration is misspelled against Corroboration, meaning "additional strengthening evidence"
Corroboration has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings co & oboration which should not be misspelled with single 'R'
Wrong Spelling:  co-r-oboration  Correct Spelling:  co-rr-oboration 
Find more incorrect spellings of Corroboration to spell right way.