meddler vs persona non grata

meddler and persona non grata both are nouns.

Word	Noun	Adjective	Verb	Adverb
meddler	Yes	No	No	No
persona non grata	Yes	No	No	No

As nouns, persona non grata is a hypernym of meddler; that is, persona non grata is a word with a broader meaning than meddler:

Other hypernyms of meddler include unwelcome person.

meddler (noun)	persona non grata (noun)
an officious annoying person who interferes with others	a person who for some reason is not wanted or welcome
	a diplomat who is unacceptable to the government to which he is sent