The term 'NEIGHBOR OF WASH' can be solved by the crossword solutions IDA (3 letters), ORE (3 letters), and OREG (4 letters). IDA is an acronym for Idaho, a state in the northwestern region of the United States. ORE is an acronym for Oregon, another state in the northwestern region of the United States. OREG is an acronym for Oregon, which is the same state as ORE. Both Idaho and Oregon are neighbors of Washington, the state from which the term 'NEIGHBOR OF WASH' originates.