polarity vs mutual opposition

polarity and mutual opposition both are nouns.

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

As nouns, polarity and mutual opposition are synonyms defined as:

polarity and mutual opposition: a relation between two opposite attributes or tendencies

polarity (noun)	mutual opposition (noun)
having an indicated pole (as the distinction between positive and negative electric charges)	a relation between two opposite attributes or tendencies
a relation between two opposite attributes or tendencies