administrative body vs administrative unit

administrative body and administrative unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
administrative body	Yes	No	No	No
administrative unit	Yes	No	No	No

As nouns, administrative body and administrative unit are synonyms defined as:

administrative body and administrative unit: a unit with administrative responsibilities

administrative body (noun)	administrative unit (noun)
a unit with administrative responsibilities	a unit with administrative responsibilities