Webster's 1828 Dictionary
CONSPIRATOR
n. 1. One who conspires; one who engages in a plot to commit a crime, particularly treason.
2. In law, one who agrees with another falsely and maliciously to indict an innocent person of felony. By the British statute, a conspirator is defined to be one who binds himself by oath, covenant, or other alliance, to assist another falsely and maliciously to indict a person, or falsely to maintain pleas.
Webster's 1913 Dictionary
CONSPIRATOR
CONSPIRATOR Con *spir "a *tor, n.
Defn: One who engages in a conspiracy; a plotter. 2 Sam. xv. 31.
New American Oxford Dictionary
conspirator
con spir a tor |kənˈspirətər kənˈspɪrədər | ▶noun a person who takes part in a conspiracy. DERIVATIVES con spir a to ri al |kənˌspirəˈtôrēəl |adjective, con spir a to ri al ly |kənˌspirəˈtôrēəlē |adverb ORIGIN late Middle English: from Old French conspirateur, from Latin conspirator, from conspirat- ‘agreed, plotted, ’ from the verb conspirare (see conspire ).
Oxford Dictionary
conspirator
con |spir ¦ator |kənˈspɪrətə | ▶noun a person who takes part in a conspiracy. DERIVATIVES conspiratorial |-ˈtɔːrɪəl |adjective, conspiratorially |-ˈtɔːrɪəli |adverb ORIGIN late Middle English: from Old French conspirateur, from Latin conspirator, from conspirat- ‘agreed, plotted ’, from the verb conspirare (see conspire ).
American Oxford Thesaurus
conspirator
conspirator noun is there any credible evidence of a conspirator working with Oswald? plotter, schemer, intriguer, colluder, collaborator, conniver.
Oxford Thesaurus
conspirator
conspirator noun conspirators had planned to seize the state: conspirer, plotter, schemer, intriguer, colluder, collaborator, conniver, machinator, confederate, cabalist; traitor.
Sanseido Wisdom Dictionary
conspirator
con spir a tor /kənspɪ́rətə r /名詞 C 陰謀者, 共謀者 .
conspiratorial
con spir a to ri al /kənspɪ̀rətɔ́ːriəl /形容詞 1 陰謀の, 共謀の .2 いわくありげな ; 陰謀じみた .~ly 副詞 ひそかに ; 陰謀をはかって .