My former foster Cinnamon was very bitey at 6 months old. I had to just be patient with her, and give her "time out" if she bit. By this past New Year's she was a year and a half old and had way mellowed out, and turned into a mush and was finally adoptable.

You may want to handle Lizzie with heavy gloves at first; it sounds like she may need to be retrained, for whatever reason.

Good luck! Lizzie, stop biting your meowmie!