Synonyms for Fast Of Av (same or very similar meaning)
WordNet sense 1 ((Judaism) a major fast day on the Jewish calendar commemorating the destruction of the temples in Jerusalem):
Tishah b'Av, Fast of Ab, Ninth of Ab, Ninth of Av, Tisha b'Ab, Tisha b'Av, Tishah b'AbFrom the ODE community, based on WordNetadd/edit