transparentness vs transparent

transparentness is a noun but transparent is not a noun.

Word	Noun	Adjective	Verb	Adverb
transparentness	Yes	No	No	No
transparent	No	Yes	No	No

transparentness (noun)	transparent (noun)
the quality of being clear and transparent

transparentness (adjective)	transparent (adjective)
	transmitting light; able to be seen through with clarity
	easily understood or seen through (because of a lack of subtlety)
	free of deceit
	so thin as to transmit light