Fosa or Fossa: How To spell?
The word Fosa is misspelled against Fossa, a noun meaning "A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossae containing the nostrils in most birds."
Fossa has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings fo & a which should not be misspelled with single 'S'
Wrong Spelling:  fo-s-a  Correct Spelling:  fo-ss-a 
Find more incorrect spellings of Fossa to spell right way.