unit vs political unit

unit and political unit both are nouns.

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

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

unit (noun)	political unit (noun)
an assemblage of parts that is regarded as a single entity	a unit with political responsibilities
a single undivided whole
an organization regarded as part of a larger social group
a single undivided natural thing occurring in the composition of something else
any division of quantity accepted as a standard of measurement or exchange
an individual or group or structure or other entity regarded as a structural or functional constituent of a whole