Judaism vs Fast of Av

Judaism and Fast of Av both are nouns.

Word	Noun	Adjective	Verb	Adverb
Judaism	Yes	No	No	No
Fast of Av	Yes	No	No	No

Judaism (noun)	Fast of Av (noun)
the monotheistic religion of the Jews having its spiritual and ethical principles embodied chiefly in the Torah and in the Talmud	(Judaism) a major fast day on the Jewish calendar commemorating the destruction of the temples in Jerusalem
Jews collectively who practice a religion based on the Torah and the Talmud