Flies and Fly front

Flies noun - Theater) the space over the stage (out of view of the audience) used to store scenery (drop curtains.

Fly front is a synonym for flies. In some cases you can use "Fly front" instead a noun "Flies".

Fly front noun - An opening in a garment that is closed by a zipper or by buttons concealed under a fold of cloth.

Flies is a synonym for fly front. Sometimes you can replace term "Flies" with "Fly front", this terms are similar.