impartial vs partial

impartial is not a noun while partial is a noun.

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

impartial (noun)	partial (noun)
	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

impartial (adjective)	partial (adjective)
showing lack of favoritism	showing favoritism
free from undue bias or preconceived opinions	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