favouritism vs disposition

favouritism and disposition both are nouns.

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

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

favouritism: an inclination to favor some person or group
disposition: an attitude of mind especially one that favors one alternative over others

Other hypernyms of favouritism include inclination, tendency.

favouritism (noun)	disposition (noun)
unfair treatment of a person or group on the basis of prejudice	the act or means of getting rid of something
an inclination to favor some person or group	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