purlieu vs geographic region

purlieu and geographic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
purlieu	Yes	No	No	No
geographic region	Yes	No	No	No

As nouns, geographic region is a hypernym of purlieu; that is, geographic region is a word with a broader meaning than purlieu:

Other hypernyms of purlieu include geographic area, geographical area, geographical region.

purlieu (noun)	geographic region (noun)
an outer adjacent area of any place	a demarcated area of the Earth