antipodal vs opposition

antipodal and opposition both are nouns.

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

As nouns, opposition is a hypernym of antipodal; that is, opposition is a word with a broader meaning than antipodal:

antipodal (noun)	opposition (noun)
the relation of opposition along a diameter	the act of hostile groups opposing each other
	the action of opposing something that you disapprove or disagree with
	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

antipodal (adjective)	opposition (adjective)
relating to the antipodes or situated at opposite sides of the earth