We don't have synonyms for haggadahs yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are haggadah, haggadas and haggada.
(n) :
(Judaism) The text which is recited at Seder during the first and second nights of Passover, focused on the freeing of Israel from Egyptian bondage as described in the Book of Exodus.
(n) :
Alternative form of Aggadah; Talmudic parable [A homiletic and non-legalistic exegetical text in the classical rabbinic literature of Judaism, particularly as recorded in the Talmud and Midrash. A parable that demonstrates a point of the Law in the Talmud.]
(n) :
(Judaism) The text which is recited at Seder during the first and second nights of Passover, focused on the freeing of Israel from Egyptian bondage as described in the Book of Exodus.
(n) :
Alternative form of Aggadah; Talmudic parable [A homiletic and non-legalistic exegetical text in the classical rabbinic literature of Judaism, particularly as recorded in the Talmud and Midrash. A parable that demonstrates a point of the Law in the Talmud.]