different between mossiness vs mossy

English

mossy +? -ness

mossiness (usually uncountable, plural mossinesses)

The state or condition of being mossy.
- 1935, Ethelyn Emery Keays, Old roses
  Common Moss, very common and running wild about old cabins, attaining new heights of bush, greater bloom, and marvelous mossiness when in the right location […]

From Middle English mossy, equivalent to moss +? -y.

mossy (comparative mossier, superlative mossiest)

Covered in or overgrown with moss.
Synonym: moss-grown
- 1800, William Wordsworth, Song
  A violet by a mossy stone/ Half hidden from the eye,/ Fair as a star when only one/ Is shining in the sky.

mossy (plural mossies)

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