riddance vs blackball

riddance and blackball both are nouns.

Word	Noun	Adjective	Verb	Adverb
riddance	Yes	No	No	No
blackball	Yes	No	Yes	No

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

Other hyponyms of riddance include defenestration, deportation, ostracism, barring, ouster, ousting.

riddance (noun)	blackball (noun)
the act of forcing out someone or something	the act of excluding someone by a negative vote or veto
the act of removing or getting rid of something

riddance (verb)	blackball (verb)
	expel from a community or group
	vote against; refuse to endorse; refuse to assent