self-concern vs self-centeredness

self-concern and self-centeredness both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-concern	Yes	No	No	No
self-centeredness	Yes	No	No	No

As nouns, self-concern and self-centeredness are synonyms defined as:

self-concern and self-centeredness: concern for your own interests and welfare

Other synonyms of self-concern include egocentrism, egoism, self-interest.

self-concern (noun)	self-centeredness (noun)
concern for your own interests and welfare	concern for your own interests and welfare