passivity vs torpidness

passivity and torpidness both are nouns.

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

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

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

passivity (noun)	torpidness (noun)
the trait of remaining inactive; a lack of initiative	inactivity resulting from lethargy and lack of vigor or energy
submission to others or to outside influences