inequality - lack of equality; "the growing inequality between rich and poor"

far cry - a disappointing disparity; "it was a far cry from what he had expected"

gap, spread - a conspicuous disparity or difference as between two figures; "gap between income and outgo"; "the spread between lending and borrowing costs"

disconnect, disconnection, gulf - an unbridgeable disparity (as from a failure of understanding); "he felt a gulf between himself and his former friends"; "there is a vast disconnect between public opinion and federal policy"

disproportion - lack of proportion; imbalance among the parts of something