NTIS vs federal agency

NTIS and federal agency both are nouns.

Word	Noun	Adjective	Verb	Adverb
NTIS	Yes	No	No	No
federal agency	Yes	No	No	No

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

NTIS: an agency in the Technology Administration that is a primary resource for government-funded scientific and technical and engineering and business related information
federal agency: an administrative unit of government

Other hypernyms of NTIS include agency, authority, bureau, government agency, office.

NTIS (noun)	federal agency (noun)
an agency in the Technology Administration that is a primary resource for government-funded scientific and technical and engineering and business related information	an administrative unit of government