外壕[sotobori] outer moat (castle)
塹壕[zangou] trench
内壕[uchibori] inner moat
防空壕[boukuugou] air-raid shelter

掩壕[engou] cover trench
待避壕[taihigou] bomb shelter
塹壕熱[zangounetsu] trench fever

幻を追う[maboroshiwoou] to pursue an illusion
幻影[genei] phantom
幻覚[genkaku] hallucination
幻覚剤[genkakuzai] hallucinogen
幻姿[genshi] apparition

幻視[genshi] visual hallucination
幻想[gensou] illusions
幻想劇[gensougeki] non-realistic drama
幻像[genzou] phantom