perspicuousness vs limpidity

perspicuousness and limpidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
perspicuousness	Yes	No	No	No
limpidity	Yes	No	No	No

As nouns, limpidity is a hypernym of perspicuousness; that is, limpidity is a word with a broader meaning than perspicuousness:

perspicuousness: clarity as a consequence of being perspicuous
limpidity: free from obscurity and easy to understand; the comprehensibility of clear expression

Other hypernyms of perspicuousness include clarity, clearness, lucidity, lucidness, pellucidity.

perspicuousness (noun)	limpidity (noun)
clarity as a consequence of being perspicuous	passing light without diffusion or distortion
	free from obscurity and easy to understand; the comprehensibility of clear expression