blackball vs throw out

blackball is a noun but throw out is not a noun.

Word	Noun	Adjective	Verb	Adverb
blackball	Yes	No	Yes	No
throw out	No	No	Yes	No

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

Other hypernyms of blackball include expel, kick out.

blackball (noun)	throw out (noun)
the act of excluding someone by a negative vote or veto

blackball (verb)	throw out (verb)
expel from a community or group	bring forward for consideration or acceptance
vote against; refuse to endorse; refuse to assent	cease to consider; put out of judicial consideration
	throw or cast away
	remove from a position or office
	force to leave or move out