As nouns the difference between indignation and egoism
is that indignation
is an anger aroused by something perceived as an indignity, notably an offense or injustice while egoism
An anger aroused by something perceived as an indignity, notably an offense or injustice.
A self-righteous anger or disgust.
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)