Many of their weapons evolved over time to counter advances made in armor, such as the falchion, whose heavy blade was designed to break chain mail armor.
From the en.wikipedia.org
For example the backsword may be so called because it is single-edged but the falchion which is also single-edged is given its own specific name.
From the en.wikipedia.org
Earlier period arts include the use of the longsword, arming sword, falchion, dagger, shield, spear, poleaxe, halberd, and many other weapons, together with unarmed combat and wrestling.
From the en.wikipedia.org
More examples
A short broad slightly convex medieval sword with a sharp point
A falchion (from Old French fauchon, ultimately from Latin falx "sickle") is a one-handed, single-edged sword of European origin, whose design is reminiscent of the Persian scimitar and the Chinese dao. The weapon combined the weight and power of an axe with the versatility of a sword. ...
Falchion was a Finnish heavy metal band formed in 2002. Their debut album, Legacy of Heathens, was released in 2005. ...
(Falchions) Originally broad, curved swords; later a sword of any kind.
Falchion, A short broad sword, bent somewhat like a sickle, with the edge on the convex side.
A short single bladed sword with a curved blade.
A short, heavy, broad-bladed sword with a single edge, bearing a similarity to a heavy scimitar.
Noun - 1. a short, broad-bladed sword, slightly curved and with a convex cutting edge, used in medieval times 2. a name given generally and poetically to a sword, especially to the swords of Oriental and fabled warriors