Coroval or Corroval: How To spell?
The word Coroval is misspelled against Corroval, a noun meaning "A dark brown substance of vegetable origin, allied to curare, and used by the natives of New Granada as an arrow poison."
Corroval has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings co & oval which should not be misspelled with single 'R'
Wrong Spelling:  co-r-oval  Correct Spelling:  co-rr-oval 
Find more incorrect spellings of Corroval to spell right way.