public vs national

public and national both are nouns.

Word	Noun	Adjective	Verb	Adverb
public	Yes	Yes	No	No
national	Yes	Yes	No	No

public (noun)	national (noun)
people in general considered as a whole	a person who owes allegiance to that nation
a body of people sharing some common interest

public (adjective)	national (adjective)
not private; open to or concerning the people as a whole	limited to or in the interests of a particular nation
affecting the people or community as a whole	concerned with or applicable to or belonging to an entire nation or country
	of or relating to or belonging to a nation or country
	of or relating to nationality
	characteristic of or peculiar to the people of a nation
	inside the country
	owned or maintained for the public by the national government