Learn That Word

Synonyms for Singing (same or very similar meaning)

WordNet sense 1 (disclosing information or giving evidence about another):
tattle, telling

WordNet sense 2 (smooth and flowing):

WordNet sense 3 (containing or constituting or characterized by pleasing melody):
melodic, melodious

WordNet sense 4 (the act of singing vocal music):

From the ODE community, based on WordNetadd/edit