What's the difference between defilade and enfilade?

Defilade

Definition:

• (v. t.) To raise, as a rampart, so as to shelter interior works commanded from some higher point.

Example Sentences:

Enfilade

Definition:

• (n.) A line or straight passage, or the position of that which lies in a straight line.
• (n.) A firing in the direction of the length of a trench, or a line of parapet or troops, etc.; a raking fire.
• (v. t.) To pierce, scour, or rake with shot in the direction of the length of, as a work, or a line of troops.

Example Sentences:

• (1) The crux of this practical management rests in the control of perianal moisure, the elimination of which gives an enfilading effect to therapy.