相关单词近义词 defense 防卫, stronghold 要塞, castle 城堡, fortification 防御工事（尤指堡垒、要塞..., fort 堡垒, fortress 堡垒, citadel 城堡, keep 保持临近词redo, Redon相似词redneck, redo, redolent, redouble, redoubtable, redound, redox, redraw, 返回 redoubt