go into your NEI, goto options, tools, data dumps, next to enchants is a button called dump. now in your installation directory there will bea folder called dumps, in there is a file, open it with notepad++ or whatever you want to use, and in there is all of the enchants in that modpack. for best results don't use the name of the enchant, but rather the number.
the method may be different, i'm going off memory, and i'm pretty sure if something around that.
also, you can just do /enchant and it will list all of the enchants possible for that tool/weapon, pretty sure it only lists vanilla ones though.