dimness vs subduedness

dimness and subduedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
dimness	Yes	No	No	No
subduedness	Yes	No	No	No

As nouns, dimness and subduedness are synonyms defined as:

dimness and subduedness: the property of lights or sounds that lack brilliance or are reduced in intensity

dimness (noun)	subduedness (noun)
the property of lights or sounds that lack brilliance or are reduced in intensity	the property of lights or sounds that lack brilliance or are reduced in intensity
the quality of being dim or lacking contrast	a disposition to be patient and long suffering
the state of being poorly illuminated