What term describes a musical work that combines smaller, simpler forms into a larger structure?

The term that describes a musical work that combines smaller, simpler forms into a larger structure is "compound musical form." This concept is prevalent in music theory and refers to compositions that feature multiple contrasting sections or movements, each of which can stand on its own as a simpler form but collectively creates a more intricate overall structure.

A compound musical form allows for greater complexity and variation within the piece, as different sections can represent diverse musical ideas or themes. This technique is often utilized in genres like sonatas, symphonies, and certain forms of popular music, where composers draw from various smaller forms to construct a cohesive and expansive piece that maintains listener interest.

Other terms may describe aspects of musical structure, but "compound musical form" specifically highlights the idea of building a larger work from simpler, distinct components.