The term ARK has two crossword solutions: OKLA and TENN. OKLA is the abbreviation for Oklahoma, a state located in the South Central region of the United States. It is bordered by Texas to the south and west, Kansas to the north, Missouri to the northeast, Arkansas to the east, and New Mexico to the west. TENN is the abbreviation for Tennessee, a state located in the Southeastern region of the United States. It is bordered by Kentucky and Virginia to the north, North Carolina to the east, Georgia, Alabama, and Mississippi to the south, and Arkansas and Missouri to the west. Both states are considered neighbors of each other.