Answer: seawalls

AnswerCrossword Clue
SEAWALLS

Erosion protection

SEAWALLS

Features of some coastal cities

SEAWALLS

Harbor structures

SEAWALLS
Flood insurance?
SEAWALLS
Dikes.
SEAWALLSEmbankments.
SEAWALLSJetties
SEAWALLSShoreline protectors
SEAWALLSBreakwaters
SEAWALLSLevees
SEAWALLSCoastal defenses against flooding
SEAWALLSStrong shore embankments