With the "ica" thing, that's just coincidence with metallica. metallica is actually metallic in latin. The same goes for Sepultura, that's latin for a burial...

On that note, I was going through my latin dictionary a while ago and got some cool names:

Capulus - the handle of a sword
Lamina - a blade
Moriens - Death bed
Armamentarium - armour

and so forth... They weren't great though...