Encyclopedia of historical weapons - Backsword

Also Mortuary sword or German Reitschwert. Has only one cutting edge (therefore its name). The non-cutting edge is thicker, creating a wedge-like shape. This shape supposedly increases cutting capacity.

Encyclopedia of historical weapons

From Encyclopedia

Great-Sword
Infantry sword with a form of a longsword. Had to be used with both hands. Blade was flat and wide, hexagonal and…
Nagan
Sword with a serrated edge; hilt is padded and fitted with a spiked pommel. 
Zagbnal
Steel pick or beaked axe from India; often engraved and inlaid with gold.
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