Revetment and Retaining wall

Revetment noun - A facing (usually masonry) that supports an embankment.

Retaining wall and revetment are semantically related In some cases you can replace phrase "Retaining wall" with "Revetment", this terms are similar.

Retaining wall noun - A wall that is built to resist lateral pressure (especially a wall built to prevent the advance of a mass of earth).

Revetment and retaining wall are semantically related in holding wall topic. You can use "Revetment" instead a noun phrase "Retaining wall".