riprap

noun 0.596

embankment

noun 0.555

rampart

noun 0.550

battlement

noun 0.542

redan

noun 0.535

parapet

noun 0.529

ravelin

noun 0.528

retaining wall

noun 0.527

rearguard

noun 0.523

retreatment

noun 0.523

recoating

noun 0.520

recoat

noun 0.518

reline

noun 0.518

redoubt

noun 0.515

rev

noun 0.513

breastwork

noun 0.511

resurfacing

noun 0.508

reef

noun 0.505

cladding

noun 0.504

rivage

noun 0.501