throw away vs slough

throw away is not a noun while slough is a noun.

Word	Noun	Adjective	Verb	Adverb
throw away	No	No	Yes	No
slough	Yes	No	Yes	No

As verbs, slough is a hyponym of throw away; that is, slough is a word with a more specific, narrower meaning than throw away:

Other hyponyms of throw away include exuviate, molt, moult, shed, abscise, exfoliate, autotomise, autotomize.

throw away (noun)	slough (noun)
	any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
	necrotic tissue; a mortified or gangrenous part or mass
	a stagnant swamp (especially as part of a bayou)
	a hollow filled with mud

throw away (verb)	slough (verb)
to remove	cast off hair, skin, horn, or feathers
throw or cast away