political unit vs political entity

political unit and political entity both are nouns.

Word	Noun	Adjective	Verb	Adverb
political unit	Yes	No	No	No
political entity	Yes	No	No	No

As nouns, political unit and political entity are synonyms defined as:

political unit and political entity: a unit with political responsibilities

political unit (noun)	political entity (noun)
a unit with political responsibilities	a unit with political responsibilities