opposition vs polarity

opposition and polarity both are nouns.

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

As nouns, polarity is a hyponym of opposition; that is, polarity is a word with a more specific, narrower meaning than opposition:

opposition (noun)	polarity (noun)
the act of hostile groups opposing each other	having an indicated pole (as the distinction between positive and negative electric charges)
the action of opposing something that you disapprove or disagree with	a relation between two opposite attributes or tendencies
a body of people united in opposing something
an armed adversary (especially a member of an opposing military force)
a contestant that you are matched against
a direction opposite to another
the relation between opposed entities