uniformity vs uniformness

uniformity and uniformness both are nouns.

Word	Noun	Adjective	Verb	Adverb
uniformity	Yes	No	No	No
uniformness	Yes	No	No	No

As nouns, uniformity and uniformness are synonyms defined as:

uniformity and uniformness: the quality of lacking diversity or variation (even to the point of boredom)

uniformity (noun)	uniformness (noun)
the quality of lacking diversity or variation (even to the point of boredom)	the quality of lacking diversity or variation (even to the point of boredom)
a condition in which everything is regular and unvarying