different between sullenness vs moroseness

English

From sullen +? -ness

sullenness (countable and uncountable, plural sullennesses)

morose +? -ness

moroseness (usually uncountable, plural morosenesses)

Gloominess; sullenness; deep sadness.
- He acquired a slouching gait and ignoble look; his naturally reserved disposition was exaggerated into an almost idiotic excess of unsociable moroseness; and he took a grim pleasure, apparently, in exciting the aversion rather than the esteem of his few acquaintance.

Webster, Noah (1828) , “moroseness”, in An American Dictionary of the English Language
moroseness in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
“moroseness” in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.

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