Fortres or Fortress: How To spell?
The word Fortres is misspelled against Fortress, a noun meaning "A fortified place; a large and permanent fortification, sometimes including a town; a fort; a castle; a stronghold; a place of defense or security."
Fortress has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  fortre-s  Correct Spelling:  fortre-ss 
Find more incorrect spellings of Fortress to spell right way.