different between inactivity vs listlessness

English

From in- +? activity.

inactivity (countable and uncountable, plural inactivities)

The quality of being inactive; idleness; passiveness.
- 1994, Helene Barbara Weinberg, Doreen Bolger, David Park Curry, American Impressionism and Realism
  Painters depicted Idle Hours (see fig. 99), reverie, solitude, and other themes that reflected Americans' new willingness to eschew productivity, and they sold their canvases to patrons who enjoyed both the inactivities portrayed and seeing themselves portrayed in inactivities.

From listless +? -ness.

listlessness (countable and uncountable, plural listlessnesses)

The state of being listless; apathetic indifference; lethargy.
- 1749, John Cleland, Fanny Hill: Memoirs of a Woman of Pleasure, Letter the First,^[1]
  But every thing must have an end. A motion made by this angelic youth, in the listlessness of going off sleep, replac'd his shirt and the bed-cloaths in a posture that shut up that treasure from longer view.
- 1851, Herman Melville, Moby-Dick, Chapter 35,^[2]
  […] lulled into such an opium-like listlessness of vacant, unconscious reverie is this absent-minded youth by the blending cadence of waves with thoughts, that at last he loses his identity; takes the mystic ocean at his feet for the visible image of that deep, blue, bottomless soul, pervading mankind and nature; and every strange, half-seen, gliding, beautiful thing that eludes him; every dimly-discovered, uprising fin of some undiscernible form, seems to him the embodiment of those elusive thoughts that only people the soul by continually flitting through it.

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