oppose vs blackball

oppose is not a noun while blackball is a noun.

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

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

Other hyponyms of oppose include negative, veto, dissent, protest, resist.

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

oppose (verb)	blackball (verb)
be resistant to	expel from a community or group
be against; express opposition to	vote against; refuse to endorse; refuse to assent
set into opposition or rivalry
fight against or resist strongly
act against or in opposition to
contrast with equal weight or force