Complex sentence: A further distinction applied by arms historians and collectors is that a true broadsword possesses a double-edged blade, while similar wide-bladed swords with a single sharpened edge and a thickened back are called backswords.
Split into simpler sentences: A further distinction is usually applied to the term "broadsword" by arms historians and collectors, that a true broadsword possesses a double-edged blade. Similarly wide-bladed swords with a single sharpened edge and a thickened back are called backswords.