Scheme:
make plans, especially in a devious way or with intent to do something illegal or wrong.
"he schemed to bring about the collapse of the government"
synonyms:
plot, hatch a plot, conspire, intrigue, connive, maneuver, plan
"he schemed to bring about the collapse of the government"
Schematic:
(in technical contexts) a schematic diagram, in particular of an electric or electronic circuit.