political entity vs political unit

political entity and political unit both are nouns.

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

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

political entity and political unit: a unit with political responsibilities

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