propensity vs disposition

propensity and disposition both are nouns.

Word	Noun	Adjective	Verb	Adverb
propensity	Yes	No	No	No
disposition	Yes	No	No	No

As nouns, disposition is a hypernym of propensity; that is, disposition is a word with a broader meaning than propensity:

propensity: a disposition to behave in a certain way
disposition: a natural or acquired habit or characteristic tendency in a person or thing

As nouns, disposition is a hypernym of propensity; that is, disposition is a word with a broader meaning than propensity:

propensity: a natural inclination
disposition: an attitude of mind especially one that favors one alternative over others

Other hypernyms of propensity include inclination, tendency.

propensity (noun)	disposition (noun)
a disposition to behave in a certain way	the act or means of getting rid of something
a natural inclination	your usual mood
an inclination to do something	a natural or acquired habit or characteristic tendency in a person or thing
	an attitude of mind especially one that favors one alternative over others