The difference between Talus and Terreplein

Talus as a noun (anatomy):

The bone of the ankle.

Talus as a noun (geology):

A sloping heap of fragments of rock lying at the foot of a precipice.

Talus as a noun (architecture):

The slope of an embankment wall, which is thicker at the bottom than at the top.

Terreplein as a noun (obsolete, _, military):

The sloping earthen embankment behind a defensive wall.

Terreplein as a noun (military):

The level platform atop a wall, typically protected by a parapet and distinguished from the slightly higher banquette used by its defenders.

Terreplein as a noun (military):

Any level base used by artillery in the field.

Terreplein as a noun (civil engineering):

Any earthen embankment with a broad level top, such as those used for a canal elevated above a valley floor.