partialness vs partial

partialness and partial both are nouns.

Word	Noun	Adjective	Verb	Adverb
partialness	Yes	No	No	No
partial	Yes	Yes	No	No

partialness (noun)	partial (noun)
the state of being only a part; not total; incomplete	the derivative of a function of two or more variables with respect to a single variable while the other variables are considered to be constant
	a harmonic with a frequency that is a multiple of the fundamental frequency

partialness (adjective)	partial (adjective)
	showing favoritism
	constituting or comprising a part or fraction of a possible whole or entirety
	(followed by `of' or `to') having a strong preference or liking for
	being or affecting only a part; not total