A lot of thesaurus - A little bit dictionary   Overview of adj
dual   2. double, dual, twofold, two-fold, treble, threefold,
three-fold -- (having more than one decidedly dissimilar aspects
or qualities; "a double (or dual) role for an actor"; "the
office of a clergyman is twofold; public preaching and private
influence"- R.W.Emerson; "every episode has its double and
treble meaning"-Frederick Harrison)