apologue vs fable

apologue and fable both are nouns.

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

As nouns, apologue and fable are synonyms defined as:

Other synonyms of apologue include allegory, parable.

apologue (noun)	fable (noun)
a short moral story (often with animal characters)	a short moral story (often with animal characters)
	a story about mythical or supernatural beings or events
	a deliberately false or improbable account