dewiness vs dampness

dewiness and dampness both are nouns.

Word	Noun	Adjective	Verb	Adverb
dewiness	Yes	No	No	No
dampness	Yes	No	No	No

As nouns, dampness is a hypernym of dewiness; that is, dampness is a word with a broader meaning than dewiness:

dewiness: The state or property of being covered by dew, or bearing droplets of water.
dampness: a slight wetness

Other hypernyms of dewiness include damp, moistness.

dewiness (noun)	dampness (noun)
The state or property of being covered by dew, or bearing droplets of water.	a slight wetness