dump vs throw away

dump is a noun but throw away is not a noun.

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

As verbs, throw away is a hypernym of dump; that is, throw away is a word with a broader meaning than dump:

dump (noun)	throw away (noun)
a place where supplies can be stored
(computer science) a copy of the contents of a computer storage device; sometimes used in debugging programs
a piece of land where waste materials are dumped
a coarse term for defecation

dump (verb)	throw away (verb)
knock down with force	to remove
drop (stuff) in a heap or mass	throw or cast away
fall abruptly
throw away as refuse
sell at artificially low prices
sever all ties with, usually unceremoniously or irresponsibly