"Insatiableness" is a word in ENGLISH

insatiableness ENGLISH
Definition:

Greediness of appetite that can not be satisfied or
appeased; insatiability.

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Their faces were inches apart now, and he traced her lips with one finger, lightly, lightly, then placed his lips there as if he’d drawn them into being.

Julie Anne Long, What I Did For a Duke

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avidity ENGLISH

Greediness; strong appetite; eagerness; intenseness of desire; as, to eat with avidity.

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carnivoracity ENGLISH

Greediness of appetite for flesh.

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greedy ENGLISH

Having a keen appetite for food or drink; ravenous; voracious; very hungry; -- followed by of; as, a lion that …

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gulosity ENGLISH

Excessive appetite; greediness; voracity.

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insatiable ENGLISH

Not satiable; incapable of being satisfied or appeased; very greedy; as, an insatiable appetite, thirst, or desire.

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rapacious ENGLISH

Avaricious; grasping; extortionate; also, greedy; ravenous; voracious; as, rapacious usurers; a rapacious appetite.

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voracious ENGLISH

Greedy in eating; very hungry; eager to devour or swallow; ravenous; gluttonous; edacious; rapacious; as, a voracious man or appetite; …

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