passiveness vs passivity

passiveness and passivity both are nouns.

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

As nouns, passiveness and passivity are synonyms defined as:

passiveness and passivity: the trait of remaining inactive; a lack of initiative

As nouns, passiveness and passivity are synonyms defined as:

passiveness and passivity: submission to others or to outside influences

passiveness (noun)	passivity (noun)
the trait of remaining inactive; a lack of initiative	the trait of remaining inactive; a lack of initiative
submission to others or to outside influences	submission to others or to outside influences