Potemkin village vs postiche

Potemkin village and postiche both are nouns.

Word	Noun	Adjective	Verb	Adverb
Potemkin village	Yes	No	No	No
postiche	Yes	No	No	No

As nouns, postiche is a hypernym of Potemkin village; that is, postiche is a word with a broader meaning than Potemkin village:

Potemkin village: something that seems impressive but in fact lacks substance
postiche: something that is a counterfeit; not what it seems to be

Other hypernyms of Potemkin village include fake, sham.

Potemkin village (noun)	postiche (noun)
something that seems impressive but in fact lacks substance	something that is a counterfeit; not what it seems to be
	a covering or bunch of human or artificial hair used for disguise or adornment