veto vs blackball

veto and blackball both are nouns.

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

As verbs, veto and blackball are synonyms defined as:

Other synonyms of veto include negative.

veto (noun)	blackball (noun)
a vote that blocks a decision	the act of excluding someone by a negative vote or veto
the power or right to prohibit or reject a proposed or intended act (especially the power of a chief executive to reject a bill passed by the legislature)

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