Common words:
* Twofold
* Threefold
* Fourfold
* Fivefold
* Sixfold
* Sevenfold
* Eightfold
* Ninefold
* Tenfold
* Hundredfold
* Thousandfold
* Multifold
Less common words:
* Bifold (meaning folded in two)
* Trifold (meaning folded in three)
* Quadrifold (meaning folded in four)
* Manifold (meaning many and varied)
* Decafold (meaning tenfold)
Other examples:
* Backfold (in gymnastics)
* Crossfold (a type of paper folding)
* Earfold (a genetic trait in sheep)
* Eyelid fold (a medical term)
You can also create new words with "-fold" to describe a specific increase or multiplication, like "fivefold increase" or "tenfold growth".