Nouns

(n)triple, three-base hit, three-baggera base hit at which the batter stops safely at third base
(n)trio, triad, triplet, triplea set of three similar things considered as a unit
(n)triplea quantity that is three times as great as another

Verbs

(v)triple, trebleincrease threefold“Triple your income!”
(v)triplehit a three-base hit

Adjectives

(s)ternary, treble, triple, triplexhaving 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”
(s)treble, threefold, three-fold, triplethree times as great or many“a claim for treble (or triple) damages”, “a threefold increase”