The word 'rascal' is an abstract noun, a word for a naughty child or a dishonest adult; the behavior of a person, not a physical aspect of a person, makes one a rascal.

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I guess rascal is an example of an abstract noun rather to be an adjective word. Remember always that abstract nouns means it is a noun that can't be used through our common sense such as sight, hear, feels and etc. Rascal means a naugthy child or a cruel person.

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