From LSWiki

Class: Close Combat Weapon Skills
Attribute: Dexterity
Pedagogy: Physical Training

The ability to use all manner of swords in combat.  When using a sword, your 
sword skill influences your ability to hit your opponent, the damage you inflict, 
how fast your attacks are, and how well you can use your sword defensively.

Trainers

Avalon: Bercilak
Devonshire: Thalask 
 Wandering: Damon
Wandering Lhethan Hagal
Hanoma: Olaris Wanders
Kolond: Duthien (only trains dwarves)
Mycenae: Kyros
Nexus: Goth
Shadow Tower: Boko
Shakari: Tavar
Shatterspire: Sthlar
Stillwater: Captain Roberts
tlaxcala: Axton
Valathyr: Anduil Dana training only
Xi Feng Ming: Shun Lang
Association required:
Losthaven Guard: Captain Jonathan Tredwel
Guild required:
Aisenshi: Musashi
Coven: Lynda Xenetha
Elflords: Celeborn
Hawkmen: Katar
Knights of the Round Table: Sir Lancelot
Nizari: Hasan Wanders
Quest required
Corna Quests: Marshall Osaka