metic vs noncitizen

metic and noncitizen both are nouns.

Word	Noun	Adjective	Verb	Adverb
metic	Yes	No	No	No
noncitizen	Yes	No	No	No

As nouns, noncitizen is a hypernym of metic; that is, noncitizen is a word with a broader meaning than metic:

metic: an alien who paid a fee to reside in an ancient Greek city
noncitizen: a person who comes from a foreign country; someone who does not owe allegiance to your country

Other hypernyms of metic include alien, foreigner, outlander.

metic (noun)	noncitizen (noun)
an alien who paid a fee to reside in an ancient Greek city	a person who comes from a foreign country; someone who does not owe allegiance to your country