There is no synonym for fabe because there is no such word as fabe.
mystery dah
myth
myth
Motionless is a synonym for calmness. It begins with the letter m.
"Myth" is the closest answer, although strictly speaking, it is not a synonym of fable, as it does not mean the same thing.
A synonym for fable (4 letters, beginning with M) is myth.
synonym
probably "myth"
Marvelous is a synonym for good. It begins with the letter M.
myth
Merry is a synonym for happy. It begins with the letter m.
Marvelous is a synonym for good. It begins with the letter m.