trueness vs regionalism

trueness and regionalism both are nouns.

Word	Noun	Adjective	Verb	Adverb
trueness	Yes	No	No	No
regionalism	Yes	No	No	No

As nouns, regionalism is a hyponym of trueness; that is, regionalism is a word with a more specific, narrower meaning than trueness:

trueness (noun)	regionalism (noun)
exactness of adjustment	loyalty to the interests of a particular region
the quality of being loyal	a feature (as a pronunciation or expression or custom) that is characteristic of a particular region
conformity to reality or actuality	a foreign policy that defines the international interests of a country in terms of particular geographic areas