egomaniac vs. narcissist
noun
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someone who displays egomania, a tendency to refer to oneself excessively and boastfully.
Academic research appears to be a rat race of high-strung egomaniacs fighting over grant money, recognition, and their scientific legacies.
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someone who displays excessive selfishness and self-centeredness.
Many have claimed that social media will turn us all into narcissists, egomaniacs, and internet addicts.
noun
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a person who is overly self-involved, and often vain and selfish.
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Psychiatry. a person who has narcissistic personality disorder.
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Psychoanalysis. a person who experiences or exhibits narcissism, deriving erotic gratification from admiration of their own physical or mental attributes.