invariability vs evenness

invariability and evenness both are nouns.

Word	Noun	Adjective	Verb	Adverb
invariability	Yes	No	No	No
evenness	Yes	No	No	No

As nouns, invariability and evenness are synonyms defined as:

invariability and evenness: a quality of uniformity and lack of variation

invariability (noun)	evenness (noun)
the quality of being resistant to variation	a quality of uniformity and lack of variation
a quality of uniformity and lack of variation	the quality of being balanced
	the parity of even numbers (divisible by two)