* Conspire
* Intrigue
* Plot (in the sense of a secret plan)
* Machinate
* Clandestinely plan
* Covertly maneuver
* Surreptitiously arrange
* Undermine (if the plot is intended to harm someone or something)
* Devise (if the plot is more about coming up with a plan than carrying it out)
* Engineer (if the plot is more complex and involves a lot of planning)
* Fabricate (if the plot involves creating a false story or situation)
* Manipulate (if the plot involves controlling people or events)
* Orchestrate (if the plot is carefully planned and executed)
* Wrangle (if the plot involves overcoming obstacles or getting people to cooperate)
* Subvert (if the plot is intended to overthrow or undermine something)
* Conspire (if the plot involves multiple people working together secretly)