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The abstract noun forms of the verb to concentrate are concentration and the gerund, concentrating.

The noun 'concentration' is an abstract noun as a word for the ability to give your attention or thought to a single object or activity; a word for a concept.

The word 'concentrate' and 'concentration' are concrete nouns as words for a substance made by removing water or other diluting agent; a word for a physical thing.

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9y ago

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