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aberration
_noun: a departure from what is normal or expected.
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aspiration
_noun: a hope or ambition of achieving something.
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alteration
_noun: the act of changing or modifying something.
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adumbration
_noun: a foreshadowing or an outline of something.
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assassination
_noun: the murder of a prominent person for political or social reasons.
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abomination
_noun: a thing that causes disgust or hatred.
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appreciation
_noun: recognition and enjoyment of the good qualities of someone or something.
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authentication
_noun: the process of verifying the identity of a person or device.
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approximation
_noun: a value or quantity that is nearly but not exactly correct.
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administration
_noun: the process or activity of running a business, organization, etc.