a person who over reacts over nothing
There are several terms to describe a person who over-reacts to small and unimportant situations, such as: anxious drama queen hysteric introverted nervous neurotic over dramatic over sensitive squeamish twitchy unstable
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A person who overreacts to small and unimportant situations is often described as "dramatic" or "melodramatic."
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epicure
There are a number of things you can call a person who has command over their vast vocabulary. You could say this person is a scholar or educated for example.