vividness vs vivid

vividness is a noun but vivid is not a noun.

Word	Noun	Adjective	Verb	Adverb
vividness	Yes	No	No	No
vivid	No	Yes	No	No

vividness (noun)	vivid (noun)
chromatic purity: freedom from dilution with white and hence vivid in hue
interest and variety and intensity

vividness (adjective)	vivid (adjective)
	having the clarity and freshness of immediate experience
	having strong or striking color
	evoking lifelike images within the mind
	(of color) having the highest saturation