Nestegg

Noun: A sum of money kept aside for future use, typically for retirement.

Example Sentence: Sarah diligently saved a portion of her monthly income to build a solid nestegg for her retirement.

Related Products on Amazon: Retirement Planning Books, Investment Strategy Guides

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Noun: A place where birds lay and hatch their eggs.

Example Sentence: We discovered a small nestegg hidden in the trees, containing four beautiful bluebird eggs.

Related Products on Amazon: Bird Nests, Bird Feeders

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Verb: To form or build a nest, typically for birds.

Example Sentence: The bird began to nestegg in the tree's hollow, preparing a safe home for its offspring.

Related Products on Amazon: Bird Houses, Bird Nesting Material