allegory vs apologue

allegory and apologue both are nouns.

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

As nouns, allegory and apologue are synonyms defined as:

allegory and apologue: a short moral story (often with animal characters)

Other synonyms of allegory include fable, parable.

allegory (noun)	apologue (noun)
a short moral story (often with animal characters)	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