con·spire /kən-'spīr/ vi con·spired, con·spir·ing [Latin conspirare to be in harmony, to join in an unlawful agreement, from com - together + spirare to breathe]: to join in a conspiracy compare solicit
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
abet, act in combination, act in concert, act in harmony, agree, aid, associate, be banded together, be stealthy, cabal, calculate, coact, cohere, collude, combine, combine for some evil design, combine operations, concert, concoct a plot, concur, confederate, confederate for an unlawful purpose, coniurare, conjoin, connive, conspirare, contribute toward, contrive, cooperate, countermine, counterplot, cowork, design, devise, devise treachery, form a coalition, form plots, frame, hatch a plot, hold together, intrigue, join, join forces, league together, league with, machinate, make an agreement with, make secret arrangements, maneuver, participate in an unlawful scheme, plan, plan a crime, plan an unlawful act, plan secretly, plan to commit a crime, plot, plot an action in advance, plot craftily, plot together, scheme, take part in, take part with, unify, unite
associated concepts: conspire to commit a crime, conspire I to defraud the United States Government
combine (act in concert), connive, contrive, cooperate, maneuver, plan, plot, scheme
Burton's Legal Thesaurus. William C. Burton. 2006