Folio and Flyleaf

Folio noun - A book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages.

Flyleaf and folio are semantically related. In some cases you can use "Flyleaf" instead a noun "Folio".

Flyleaf noun - A blank leaf in the front or back of a book.

Folio and flyleaf are semantically related. You can use "Folio" instead a noun "Flyleaf".