The term 'Neighbor of Calif.' can be answered by two crossword solutions: OREG (4 letters) and NEV (3 letters). OREG stands for Oregon, which is a state located in the Pacific Northwest region of the United States. It borders California to the south and shares a border with Washington to the north. NEV stands for Nevada, which is a state located in the western United States. It borders California to the west and shares a border with Utah to the east. Both Oregon and Nevada are neighbors of California.