ミサイル防衛[misairubouei] missile defence
衛視[eishi] guards at parliament
衛所[eisho] place guarded by soldiers
衛星[eisei] satellite
衛星地球局[eiseichikyuukyoku] (satellite) earth station

衛星放送[eiseihousou] satellite broadcasting
衛生[eisei] health
衛生基準[eiseikijun] health standards
衛兵[eihei] palace guard
共同防衛[kyoudoubouei] joint defense