mordacity vs disposition

mordacity and disposition both are nouns.

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

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

mordacity: a disposition to biting
disposition: a natural or acquired habit or characteristic tendency in a person or thing

mordacity (noun)	disposition (noun)
a disposition to biting	the act or means of getting rid of something
	your usual mood
	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