Aesop's fables vs fable

Aesop's fables and fable both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aesop's fables	Yes	No	No	No
fable	Yes	No	No	No

As nouns, fable is a hypernym of Aesop's fables; that is, fable is a word with a broader meaning than Aesop's fables:

Aesop's fables: a collection of fables believed to have been written by the Greek storyteller Aesop
fable: a short moral story (often with animal characters)

Other hypernyms of Aesop's fables include allegory, apologue, parable.

Aesop's fables (noun)	fable (noun)
a collection of fables believed to have been written by the Greek storyteller Aesop	a short moral story (often with animal characters)
	a story about mythical or supernatural beings or events
	a deliberately false or improbable account