参謀【さんぼう】
staff officer, military staff, adviser, counselor, counsellor
陰謀【いんぼう】
plot, intrigue, scheme, conspiracy, agreement between two or more people to commit an unlawful act
共謀【きょうぼう】
conspiracy, collusion, complicity
無謀【むぼう】
reckless, thoughtless, rash, ill-advised, impulsive, mad (e.g. scheme)
謀略【ぼうりゃく】
scheme, plot, artifice, stratagem, trick