bacchanal vs orgiastic

bacchanal is a noun but orgiastic is not a noun.

Word	Noun	Adjective	Verb	Adverb
bacchanal	Yes	Yes	No	No
orgiastic	No	Yes	No	No

As adjectives, bacchanal and orgiastic are synonyms defined as:

Other synonyms of bacchanal include bacchanalian, bacchic, carousing.

bacchanal (noun)	orgiastic (noun)
a wild gathering involving excessive drinking and promiscuity
someone who engages in drinking bouts
a drunken reveller; a devotee of Bacchus

bacchanal (adjective)	orgiastic (adjective)
used of riotously drunken merrymaking	used of riotously drunken merrymaking
	used of frenzied sexual activity