Goblins, generally, can be found to be wielding one of four types of weapon
Firstly, there is the wickedly curved (or wavy) sword. This is the mainstay of goblin warfare, largely because they're vicious little buggers who love causing hurt to anything around them.
Second, there is the spear, or, more often, the Pointy Stick. Typically wielded by goblins who are vicious, but either have some modicum of self-preservation instinct, or are just too slow to get the any of the "good" spots up the front.
Third there is the bow. Beware the goblin bowman, because he lacks the kind of craziness requires for front-line fighting, and thus might be capable of some actual tactics and proper target selection. Particularly nasty are those bowmen who have the skill to coat their arrows in hallucinogenic poisons.
And lastly, but by now means least, no matter how silly it may seem, there are those goblins who go into battle armed not with a sword, or a spear, nor even a bow, but with whatever they can pick up and throw. This is a problem, because as these are often the craziest goblin, they will often select rather dangerous missiles, such as flasks of burning oil, or rabid rats.
Or, occasionally, rabid rats covered in burning oil.