It has come to my attention that in one of the vocab lists I linked you to, "magna" is listed as a noun. This is TOTALLY incorrect. It is an ADJECTIVE. I don't know how they messed that up, but it's true. "Magna, magnae" is an adjective.
Please, I hope this clears up some confusions for everything.
And if you come across something suspicious-looking in the future, please ask, just in case.