trio, triad, triplet, triple -- (a set of three similar things considered as a unit)
triple -- (a quantity that is three times as great as another)
Overview of verb triple
The verb triple has 2 senses
triple, treble -- (increase threefold; "Triple your income!")
triple -- (hit a three-base hit)
Overview of adj triple
The adj triple has 2 senses
ternary, treble, triple, triplex -- (having three units or components or elements; "a ternary operation"; "a treble row of red beads"; "overcrowding made triple sessions necessary"; "triple time has three beats per measure"; "triplex windows")
treble, threefold, three-fold, triple -- (three times as great or many; "a claim for treble (or triple) damages"; "a threefold increase")