passivity vs apathy

passivity and apathy both are nouns.

Word	Noun	Adjective	Verb	Adverb
passivity	Yes	No	No	No
apathy	Yes	No	No	No

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

Other hyponyms of passivity include indifference, numbness, spiritlessness, listlessness, torpidity, torpidness, torpor.

passivity (noun)	apathy (noun)
the trait of remaining inactive; a lack of initiative	the trait of lacking enthusiasm for or interest in things generally
submission to others or to outside influences	an absence of emotion or enthusiasm