Fleetnes or Fleetness: How To spell?
The word Fleetnes is misspelled against Fleetness, a noun meaning "Swiftness; rapidity; velocity; celerity; speed; as, the fleetness of a horse or of time."
Fleetness 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:  fleetne-s  Correct Spelling:  fleetne-ss 
Explore spell check of Fleetness to spell without errors.