えん堤[entei] dam
手堤[tesage] handbag
堤防[teibou] bank
堤出[teishutsu] to present
突堤[tottei] breakwater

防波堤[bouhatei] breakwater
墨堤[bokutei] banks of the Sumida river
防潮堤[bouchoutei] tide embankment
築堤[chikutei] embankment

ミサイル防衛[misairubouei] missile defence
共同防衛[kyoudoubouei] joint defense
攻防[koubou] offense and defense
攻防戦[koubousen] battle
国防[kokubou] national defence

国防総省[kokubousoushou] National Military Establishment
国防長官[kokubouchoukan] Secretary of Defence (Defense)
国防費[kokubouhi] defence expenditure
砂防[sabou] erosion control
酸化防止剤[sankaboushizai] antioxidant