double-edged (e.g. sword blade); double-beveled (e.g. kitchen knife); double-edged blade
edged tool; cutting instrument; knife
length of a blade; walking barefoot on the edge of a sword blade (acrobatic stunt)
single edge (e.g. sword blade); single bevel (e.g. kitchen knife)
nick in a blade (sword, knife); chip in a blade
temper pattern of a sword blade
sound of a blade (swishing through the air, clashing, etc.)