Chef-d'oeuvre and Piece of work

Chef-d'oeuvre noun - The most outstanding work of a creative artist or craftsman.

Piece of work and chef-d'oeuvre are semantically related. In some cases you can use "Piece of work" instead a noun phrase "Chef-d'oeuvre".

Piece of work noun - A product produced or accomplished through the effort or activity or agency of a person or thing.

Chef-d'oeuvre and piece of work are semantically related. Sometimes you can replace phrase "Chef-d'oeuvre" with "Piece of work", this phrases are similar.