Dionysia vs Bacchanalia

Dionysia and Bacchanalia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dionysia	Yes	No	No	No
Bacchanalia	Yes	No	No	No

As nouns, Dionysia and Bacchanalia are synonyms defined as:

Dionysia and Bacchanalia: an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)

Dionysia (noun)	Bacchanalia (noun)
an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)	an orgiastic festival in ancient Greece in honor of Dionysus (= Bacchus)