Numbered works are artistic compositions that are assigned a number to distinguish them from other works of the same type. The two crossword solutions for this term are 'opuses' (6 letters) and 'OPERA' (5 letters). An opus is a musical composition, usually by a single composer, that is numbered to indicate the order of the composer's works. An OPERA is a dramatic work in which the text is set to music and is usually performed in an OPERA house.