disposal vs abandonment

disposal and abandonment both are nouns.

Word	Noun	Adjective	Verb	Adverb
disposal	Yes	No	No	No
abandonment	Yes	No	No	No

As nouns, abandonment is a hyponym of disposal; that is, abandonment is a word with a more specific, narrower meaning than disposal:

disposal: the act or means of getting rid of something
abandonment: the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away

Other hyponyms of disposal include appointment, comb-out, giving, mine disposal, sewage disposal, lending, loaning.

disposal (noun)	abandonment (noun)
the act or means of getting rid of something	withdrawing support or help despite allegiance or responsibility
a method of tending to or managing the affairs of some group of people (especially the group's business affairs)	the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away
a kitchen appliance for disposing of garbage	the act of giving something up
the power to use something or someone