self-interest vs self-centeredness

self-interest and self-centeredness both are nouns.

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

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

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

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

self-interest (noun)	self-centeredness (noun)
concern for your own interests and welfare	concern for your own interests and welfare
taking advantage of opportunities without regard for the consequences for others