Answer: revetment

AnswerCrossword Clue
REVETMENTRetaining wall
REVETMENTProtective wall
revetmenta masonry etc. facing of an embankment or trench
revetmentfacing of masonry or the like, esp. for protecting an embankment
revetmentornamental facing, as on a common masonry wall, of marble, face brick, tiles, etc.