Folio and Opus

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

Opus and folio are semantically related. in published document topic. In some cases you can use "Opus" instead a noun "Folio".

Opus noun - A literary, musical, or artistic production.

Folio and opus are semantically related. Sometimes you can use "Folio" instead a noun "Opus".