evenness vs invariability

evenness and invariability both are nouns.

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

As nouns, evenness and invariability are synonyms defined as:

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

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