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Synonyms for Vocal (same or very similar meaning)

WordNet sense 1 (music intended to be performed by one or more singers, usually with instrumental accompaniment):
vocal music

WordNet sense 2 (a short musical composition with words):

WordNet sense 3 (characterized by or producing sound of great volume or intensity):

WordNet sense 4 (given to expressing yourself freely or insistently):

WordNet sense 5 (able or tending to communicate):
communicative, communicatory

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