Short sword

From Dwarf Fortress Wiki

A short sword is typically used for combat, and is made at a Metalsmith's forge. Rock short swords can also be made from obsidian at the Craftsdwarf's workshop and make a great cheap weapon.

Rock short sword

These deal the same damage as steel, so they are extremely useful for early military and traps. However, they require one unit of wood and one unit of obsidian in their construction, which may not be available in abundance on many maps. They are produced with the Stonecrafter skill, not Weaponsmith, and are produced in a Craft Workshop.

Often, lower-grade short swords re used in weapon traps, which can hold up to 10 of any combination of weapons each.

The weapons are described as being clubs with a sharp stone edge affixed to the side. According to Toady One, the weapons are supposed to wear very quickly but this functionality has not yet been implemented.^{v0.28.181.40d}

They are most likely based on Aztec Macuahuitl.