監察[kansatsu] inspection
監察医[kansatsui] medical coroner
観察[kansatsu] observation
観察的研究[kansatsutekikenkyuu] observational study
機動警察[kidoukeisatsu] mobile police

軍事警察[gunjikeisatsu] military police
警察[keisatsu] police
警察官[keisatsukan] policemen
警察署[keisatsusho] police station