different between headiness vs heaviness

English

heady +? -ness

headiness (usually uncountable, plural headinesses)

From Middle English hevinesse, from Old English hefi?nes (“heaviness”). Equivalent to heavy +? -ness.

heaviness (countable and uncountable, plural heavinesses)

The state of being heavy; weight, weightiness, force of impact or gravity.
(archaic) Oppression; dejectedness, sadness; low spirits.
- 1590, Edmund Spenser, The Faerie Queene, II.vii:
  First got with guile, and then preseru'd with dread, / And after spent with pride and lauishnesse, / Leauing behind them griefe and heauinesse.
(obsolete) Drowsiness.
- c. 1610-11, William Shakespeare, The Tempest, Act I scene ii^[1]:
  Miranda: The strangeness of your story put / Heaviness in me.

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