Looked it up and this is what it shows.

List of blade weapons;
Arabia Knife
Beast Bone Falchion
Broken Knife
Bronze Falchion
Bronze Knife
Bronze Saber
Chopping Falchion
Cold Falchion
Cool Blue Falchion
Copper Falchion
Copper Knife
Copper Saber
Cracking Broadsword
Crescent Katana
Crescent Knife
Crescent Machete
Crystal Knife
Death Scythe
Draconic Knife
Falchion
Fatal Scythe
Flaming Blade
Ghost Horn Knife
Indian Machete
Invisible Knife
Iron Falchion
Iron Knife
Iron Saber
Katana
Killer Falchion
Long Scythe
Lotus Falcon
Machete
Moon Knife
Muramasa Katana
Pirate Rip
Plate
Poison Knife
Pure Iron Falchion
Pure Iron Falchion
Pure Iron Knife
Pure Iron Saber
Red Falchion
Samurai Katana
Sharp Katana
Spring Katana
Steel Broadswords
Steel Falchion
Steel Saber
Syringe
Violet Falchion

They aren't swords, nor are they spears.
They have their own category & cannot be weapon modeled with non-blade weapons.