Bonasus or Bonassus: How To spell?
The word Bonasus is misspelled against Bonassus, a noun meaning "The aurochs or European bison. See Aurochs."
Bonassus has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings bona & us which should not be misspelled with single 'S'
Wrong Spelling:  bona-s-us  Correct Spelling:  bona-ss-us 
Check more misspelled words of Bonassus to spell it correct.