Counterrhythm refers to a rhythmic pattern that contrasts with the prevailing beat or melody. There are several synonyms for this term that can be used interchangeably depending on the context and style of music. These include, but are not limited to, polyrhythm, off-beat, syncopation, cross-rhythm, and hemiola. Polyrhythm refers to the use of multiple rhythms played simultaneously. Off-beat refers to playing notes on the weaker beats of a measure. Syncopation involves stressing a normally weak beat or subdivision. Cross-rhythm refers to the use of multiple rhythms in different parts of the music. Hemiola involves dividing the music into groups of three in a meter that typically has groups of two. All of these synonyms add depth and complexity to music by creating contrast and tension within the rhythmic framework.