The Collaborative International Dictionary
Conspirer
Conspirer \Con*spir"er\, n. One who conspires; a conspirator.
Wiktionary
conspirer
n. Someone who conspires, agent noun of conspire
Usage examples of "conspirer".
Be lion-mettled, proud, and take no care who chafes, who frets, or where conspirers are-for if 'tis true that doomsday's near, then die all, die merrily!