Polyphonously refers to the act of speaking or singing multiple notes simultaneously. This word can be substituted with various synonyms to convey the same meaning. One of the synonyms is chordal harmonies, which refers to a musical technique that involves the simultaneous sounding of two or more notes to produce a pleasing effect. Another synonym is polyphonic, which is a musical term that describes a composition that includes two or more independent melodic lines that are woven together. Other synonyms include multivoiced, multisonant, and polyvocal, all of which describe multiple voices or sounds occurring at the same time. These synonyms accurately capture the essence of polyphonously and can be used interchangeably in various contexts.