triple vs three-fold

triple is a noun but three-fold is not a noun.

Word	Noun	Adjective	Verb	Adverb
triple	Yes	Yes	Yes	No
three-fold	No	Yes	No	No

As adjectives, triple and three-fold are synonyms defined as:

Other synonyms of triple include threefold, treble.

triple (noun)	three-fold (noun)
a base hit at which the batter stops safely at third base
a quantity that is three times as great as another
a set of three similar things considered as a unit

triple (adjective)	three-fold (adjective)
having three units or components or elements	three times as great or many
three times as great or many	having more than one decidedly dissimilar aspects or qualities

triple (verb)	three-fold (verb)
increase threefold
hit a three-base hit