evenness vs smoothness

evenness and smoothness both are nouns.

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

As nouns, smoothness is a hyponym of evenness; that is, smoothness is a word with a more specific, narrower meaning than evenness:

evenness (noun)	smoothness (noun)
a quality of uniformity and lack of variation	a texture without roughness; smooth to the touch
the quality of being balanced	the quality of having a level and even surface
the parity of even numbers (divisible by two)	the quality of being free from errors or interruptions
	the quality of being bland and gracious or ingratiating in manner
	powerful and effective language