egoist vs. egotist

egoist

noun

  1. a self-centered or selfish person ( altruist ).
  2. an arrogantly conceited person; egotist.
  3. an adherent of the metaphysical principle of the ego, or self; solipsist.

egotist

noun

  1. a conceited, boastful person.
  2. a selfish person; egoist.