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)

雲鬢花顔[unbinkagan] beautiful woman (metaphorical)
横顔[yokogao] face in profile
温顔[ongan] kindly face
なに食わぬ顔[nanikuwanukao] innocent look
我物顔[wagamonogao] looking or acting as if one owned the place

汗顔[kangan] ashamed
顔から火が出る[kaokarahigaderu] to be extremely embarrassed
顔を顰める[kaowoshikameru] to grimace
顔を潰す[kaowotsubusu] to make somebody lose face