Myth
"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.
myth
myth
probably "myth"
A 'myth'.
myth
myth
There is no synonym for fabe because there is no such word as fabe.
mystery dah
fable
Motionless is a synonym for calmness. It begins with the letter m.