Open English Wordnet
Adjectives
(s)treble, threefold, three-fold, triplethree times as great or many“a claim for treble (or triple) damages”, “a threefold increase”
(s)double, dual, twofold, two-fold, treble, threefold, three-foldhaving 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)