This essay focuses on the language of domestic radicalization as it has been invoked in recent debates regarding homeland security and the specter of homegrown Islamic terrorism. The language of radicalization is not new. However, beginning in 2004 and 2005 this language began to be appropriated into legislative and law enforcement discussions of domestic terrorism and national security. Using the rhetorical figure of polyptoton as a critical frame, this essay explores how the language of radicalization has evolved and how it has come to shape available arguments and define the legitimacy of participants (and non-participants) within recent congressional hearings and legislation.