newness vs freshness

newness and freshness both are nouns.

Word	Noun	Adjective	Verb	Adverb
newness	Yes	No	No	No
freshness	Yes	No	No	No

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

newness: the quality of being new; the opposite of oldness
freshness: the property of being pure and fresh (as if newly made); not stale or deteriorated

Other hyponyms of newness include brand-newness, recency, recentness, revolutionariness.

newness (noun)	freshness (noun)
the quality of being new; the opposite of oldness	originality by virtue of being refreshingly novel
	the property of being pure and fresh (as if newly made); not stale or deteriorated
	the trait of being rude and impertinent; inclined to take liberties
	originality by virtue of being new and surprising
	an alert and refreshed state