lucidness vs pellucidity

lucidness and pellucidity both are nouns.

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

As nouns, lucidness and pellucidity are synonyms defined as:

lucidness and pellucidity: free from obscurity and easy to understand; the comprehensibility of clear expression

Other synonyms of lucidness include clarity, clearness, limpidity, lucidity.

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