S: (n) conspiracy, cabal (a plot to carry out some harmful or illegal act (especially a political plot))
Verb
S: (v) conspire, cabal, complot, conjure, machinate (engage in plotting or enter into a conspiracy, swear together) "They conspired to overthrow the government"
W: (adj) conspirative [Related to: conspire] (relating to or characteristic of conspiracy or conspirators) "a conspiratorial whisper"; "the discovery of possible conspirative codes"