掩蓋[engai] cover(ing)
掩護部隊[engobutai] covering force
掩蔽[enpei] cover
掩い[ooi] cover
掩護[engo] covering

掩う[oou] to cover
掩壕[engou] cover trench
顔を掩う[kaowooou] to cover one's face
掩護射撃[engoshageki] (providing) covering fire
掩撃[engeki] sneak attack (by a small group)