WalterKovacs
First Post
Running with you 'class as adjective' idea you can set it so that all three class names describe the same sort of idea.
Movement:
1) Immoveable
2) Fleet
3) Unstoppable
Attitude:
1) Unbending
2) Vicious (lethal?)
2) Inexorable
Fighting style:
1) Stalwart
2) Nimble
3) Brutal
Philosophy:
1) Guardian
2) Killer
3) Pragmatist
1) Rock
2) Scissors
3) Paper

Although, it does fit to an extent, as the Rock is defensively minded, the scissors are offensively minded with the paper is about rendering someone useless. If you render a rock useless his ability to fight back is less than the scissors would be, and it allows people to deal with the less strongly defensive targets.
Some of the ideas, like martial artists, may not be good for names, but definitely as examples that explain what each of the named classes represent. While the name is important, having the definition of what the name/class means an represents is going to be more important in the long run, so even suggestions that don't work as names should be helpful in the long run.
But in the similar vein to the quote:
1) Deflecting - His power is in being able to withstand/block attacks
2) Piercing - His power is in getting past defences and hitting with attacks
3) Binding - His power is in tying people up/keeping them busy/taking them out of the fight in some way ... either through grapple/trip/disarm to render them incapable of fighting anyone else, or through strangle/backstab situations where it's an occaisional quick disabling.