cheerfulness vs disposition

cheerfulness and disposition both are nouns.

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

cheerfulness (noun)	disposition (noun)
the quality of being cheerful and dispelling gloom	the act or means of getting rid of something
a feeling of spontaneous good spirits	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