Note
Stratagem, from Google dictionary
/ˈstratədʒəm/
noun a plan or scheme, especially one used to outwit an opponent or achieve an end.” a series of devious stratagems”
Similar: Plan, Scheme, Subterfuge, Tactic, Machination, Deceit, Trick, Ploy, Deception, Conspiracy.
2.ARCHAIC
skill in devising plans or schemes; cunning.