mutual opposition vs polarity

mutual opposition and polarity both are nouns.

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

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

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

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