CTC vs government agency

CTC and government agency both are nouns.

Word	Noun	Adjective	Verb	Adverb
CTC	Yes	No	No	No
government agency	Yes	No	No	No

As nouns, government agency is a hypernym of CTC; that is, government agency is a word with a broader meaning than CTC:

CTC: an agency that helps the Director of Central Intelligence coordinate counterterrorist efforts in order to preempt and disrupt and defeat terrorist activities at the earliest possible stage
government agency: an administrative unit of government

Other hypernyms of CTC include agency, authority, bureau, federal agency, office.

CTC (noun)	government agency (noun)
an agency that helps the Director of Central Intelligence coordinate counterterrorist efforts in order to preempt and disrupt and defeat terrorist activities at the earliest possible stage	an administrative unit of government