The term "key pattern" refers to a specific repeating sequence of musical notes or chords, often used as the basis for a song or composition. Some synonyms for this term include "chord progression," "tonal structure," "harmonic sequence," and "musical motif." These terms all refer to the same basic concept of a set of notes or chords that form the backbone of a piece of music, creating a sense of order and coherence. While the specific terminology may vary depending on the musical genre or context, the concept of the key pattern remains a key element of music theory and composition.