egoism vs egocentrism

egoism and egocentrism both are nouns.

Word	Noun	Adjective	Verb	Adverb
egoism	Yes	No	No	No
egocentrism	Yes	No	No	No

As nouns, egoism and egocentrism are synonyms defined as:

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

egoism (noun)	egocentrism (noun)
concern for your own interests and welfare	concern for your own interests and welfare
(ethics) the theory that the pursuit of your own welfare is the basis of morality