Allegro and Piece of music

Allegro noun - A musical composition or musical passage to be performed quickly in a brisk lively manner.

Piece of music and allegro are semantically related. In some cases you can use "Piece of music" instead a noun "Allegro".

Piece of music noun - A musical work that has been created.

Allegro and piece of music are semantically related. Sometimes you can replace term "Allegro" with "Piece of music", this terms are similar.