Nocnoun
an undercover agent who is given no official cover
Docnoun
(informal) A doctor.
Docnoun
A document, especially (in professional jargon) a piece of technical documentation or legal evidence.
Docnoun
(informal) A documentary.
Docnoun
a licensed medical practitioner;
Docnoun
the United States federal department that promotes and administers domestic and foreign trade (including management of the census and the patent office); created in 1913