Egotism
Part of speech: noun
Definition: A tendency to talk excessively about oneself. A belief that one is superior to or more important than others. Egoism. The result or product of being egoistic.
Example sentence: Mastery passes often for egotism.
Self-importance
Part of speech: noun
Definition: An exaggerated estimate of one's own importance or merit, especially as manifested by the conduct or manners; self-conceit.