For every Weapon Skill, there is a Mastery Skill too. For unarmed
combat there are in fact even two.
Weapons Mastery increased all offensive and defensive rolls, when the
weapon is used in combat.
Sword Master
Dagger Master
Spear Master
Whip Master
Axe Master
Polearm Master
Mace Master
Flail Master
Marksman (for guns of all sorts)
Martial Arts (Hand to Hand), Black Belt (improved Martial
Arts)