AXE, SWORD, SPEAR, CLUB - the differences

Does anyone know the differences between these weapons? I mean only the 70th column in the gnome editor.
I know the advantage of SPEAR - it removes enemy charge bonus (maybe cavalry only - i don't remember) and reduces "pushback" probability.
What about three other weapons?
---- EDIT----
A small thing I've found: SWORD gives +1 attack against SPEAR.
Still don't know anything about CLUB and AXE.

I'm not too knowledgeable on the internal mechanics of it. Spears seem to be the only one with any sort of advantage, but I haven't ever really tested this aspect of units.

I'm definitely going to test these features out properly.