allegorical vs allegory

allegorical is not a noun while allegory is a noun.

Word	Noun	Adjective	Verb	Adverb
allegorical	No	Yes	No	No
allegory	Yes	No	No	No

allegorical (noun)	allegory (noun)
	a short moral story (often with animal characters)
	an expressive style that uses fictional characters and events to describe some subject by suggestive resemblances; an extended metaphor
	a visible symbol representing an abstract idea

allegorical (adjective)	allegory (adjective)
used in or characteristic of or containing allegory