sewage disposal vs disposition

sewage disposal and disposition both are nouns.

Word	Noun	Adjective	Verb	Adverb
sewage disposal	Yes	No	No	No
disposition	Yes	No	No	No

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

Other hypernyms of sewage disposal include disposal.

sewage disposal (noun)	disposition (noun)
the disposal of sewage	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