What is the difference between "Opus" and "Song Cycle"?

Question

What is the difference between "Opus" and "Song Cycle", because "Opus" is a separate composition or a set of compositions. A song cycle is the same, isn't it? Whenever I go to wikipedia for a song, for example when I searched up a song cycle called Winterreise by Franz Schubert, it said that it was his 89th opus, but didn't they just say that it was a song cycle?Any response is appreciated.Update:How do you know whether an opus is part of a song cycle? Pls give me an analogy to help me.

Answer 1

An opus is a publishing term. It can be any kind of musical work, from symphonies, concertos, sonatas, duets, song cycles, etc.

A song cycle is one type of composition that features a set of related songs and usually piano accompaniment. Song cycle refers to the type of work it is whereas opus is just related to the order they published all their music in.