negativeness vs polarity

negativeness and polarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
negativeness	Yes	No	No	No
polarity	Yes	No	No	No

As nouns, polarity is a hypernym of negativeness; that is, polarity is a word with a broader meaning than negativeness:

negativeness: the character of the negative electric pole
polarity: having an indicated pole (as the distinction between positive and negative electric charges)

Other hypernyms of negativeness include sign.

negativeness (noun)	polarity (noun)
characterized by habitual skepticism and a disagreeable tendency to deny or oppose or resist suggestions or commands	having an indicated pole (as the distinction between positive and negative electric charges)
an amount less than zero	a relation between two opposite attributes or tendencies
the character of the negative electric pole