SECRET AGENT
NOUNS
1549 • INTELLIGENCE communication of esp. confidential information by a secret agent, ambassador, etc.
NOUNS, PERSON
1540 • INTELLIGENCER a person who is employed to obtain confidential information; a secret agent, a spy
1682 • UNDER-PULLER a secret agent
1963 • ILLEGAL a Soviet secret agent working in a foreign country
1884 • BLACK OPERATOR a secret agent or spy → Amer. euphemism
Lexicophilia 