pellucidity vs pellucidness

pellucidity and pellucidness both are nouns.

Word	Noun	Adjective	Verb	Adverb
pellucidity	Yes	No	No	No
pellucidness	Yes	No	No	No

As nouns, pellucidity and pellucidness are synonyms defined as:

pellucidity and pellucidness: passing light without diffusion or distortion

Other synonyms of pellucidity include limpidity.

pellucidity (noun)	pellucidness (noun)
passing light without diffusion or distortion	passing light without diffusion or distortion
free from obscurity and easy to understand; the comprehensibility of clear expression