pricelessness vs preciousness

pricelessness and preciousness both are nouns.

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

As nouns, pricelessness and preciousness are synonyms defined as:

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

Other synonyms of pricelessness include invaluableness, valuableness.

pricelessness (noun)	preciousness (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