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Downness vs Downiness - What's the difference?

downness | downiness |

As nouns the difference between downness and downiness

is that downness is (quantum physics) the property of being a down quark while downiness is the quality of being downy.

downness

English

Noun

(-)
  • (quantum physics) The property of being a down quark.

    • downiness

    English

    Noun

    (-)
  • The quality of being downy.
    • (Webster 1913)