Nasa or Nassa: How To spell?
The word Nasa is misspelled against Nassa, a noun meaning "Any species of marine gastropods, of the genera Nassa, Tritia, and other allied genera of the family Nassidae; a dog whelk. See Illust. under Gastropoda."
Nassa has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings na & a which should not be misspelled with single 'S'
Wrong Spelling:  na-s-a  Correct Spelling:  na-ss-a 
Browse incorrect spellings of Nassa to spell it good.