Fables and Saga

Saga and fables are semantically related. In some cases you can use "Saga" instead a noun "Fables".

Saga noun - A narrative telling the adventures of a hero or a family; originally (12th to 14th centuries) a story of the families that settled Iceland and their descendants but now any prose narrative that resembles such an account.

Fables and saga are semantically related. Sometimes you can replace term "Fables" with "Saga", this nouns are similar.