parable vs apologue

parable and apologue both are nouns.

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

As nouns, parable and apologue are synonyms defined as:

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

Other synonyms of parable include allegory, fable.

parable (noun)	apologue (noun)
a short moral story (often with animal characters)	a short moral story (often with animal characters)
(New Testament) any of the stories told by Jesus to convey his religious message