As nouns the difference between egoism and egocentrism
is that egoism
is while egocentrism
is the constant following of one's egotistical desires to an extreme.
The tendency to think selfishly with exclusive self-interest in mind.
(ethics) The belief that moral behavior should be directed toward one's self-interest only.
(nonstandard, by confusion of the similar words) egotism
* (tendency to think of self) selfishness
* (tendency to think of self) altruism
* misanthropy (hatred of human race)