The word Sargaso is misspelled against Sargasso, a noun meaning "The gulf weed. See under Gulf."
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Sargasso has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings sarga & o which should not be misspelled with single 'S'
Wrong Spelling:  sarga-s-o 
Correct Spelling:  sarga-ss-o 
Find more incorrect spellings of Sargasso to spell right way.