preciousness vs pricelessness

preciousness and pricelessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
preciousness	Yes	No	No	No
pricelessness	Yes	No	No	No

As nouns, preciousness and pricelessness are synonyms defined as:

preciousness and pricelessness: the positive quality of being precious and beyond value

Other synonyms of preciousness include invaluableness, valuableness.

preciousness (noun)	pricelessness (noun)
the positive quality of being precious and beyond value	the positive quality of being precious and beyond value
the quality of being fastidious or excessively refined
the quality possessed by something with a great price or value