throwing away vs abandonment

throwing away and abandonment both are nouns.

Word	Noun	Adjective	Verb	Adverb
throwing away	Yes	No	No	No
abandonment	Yes	No	No	No

As nouns, abandonment is a hypernym of throwing away; that is, abandonment is a word with a broader meaning than throwing away:

throwing away: getting rid of something that is regarded as useless or undesirable
abandonment: the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away

throwing away (noun)	abandonment (noun)
getting rid of something that is regarded as useless or undesirable	withdrawing support or help despite allegiance or responsibility
	the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away
	the act of giving something up