Select the option that can be used as a one-word substitute for the given group of words.

A person in love with himself

Narcissist

The option that can be used as a one-word substitute for "a person in love with himself" is narcissist.

• Narcissist is a person who has an excessive interest in or admiration of oneself and one's physical appearance.
• Lunatic is a person who has a mental illness.
• Stoic is a person who is not easily upset or excited.
• Polyglot is a person who speaks many languages.