administrator vs DCI

administrator and DCI both are nouns.

Word	Noun	Adjective	Verb	Adverb
administrator	Yes	No	No	No
DCI	Yes	No	No	No

As nouns, DCI is a hyponym of administrator; that is, DCI is a word with a more specific, narrower meaning than administrator:

administrator: someone who manages a government agency or department
DCI: the head of the United States Intelligence Community and director of the Central Intelligence Agency

Other hyponyms of administrator include commissioner, Director of Central Intelligence, prefect, Secretary General, triumvir.

administrator (noun)	DCI (noun)
someone who administers a business	the head of the United States Intelligence Community and director of the Central Intelligence Agency
the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor
someone who manages a government agency or department