moodiness vs disposition

moodiness and disposition both are nouns.

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

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

Other hypernyms of moodiness include temperament.

moodiness (noun)	disposition (noun)
having temperamental and changeable moods	the act or means of getting rid of something
a sullen gloomy feeling	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