shun vs blackball

shun is not a noun while blackball is a noun.

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

As verbs, shun and blackball are synonyms defined as:

Other synonyms of shun include ban, banish, cast out, ostracise, ostracize.

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

shun (verb)	blackball (verb)
avoid and stay away from deliberately; stay clear of	expel from a community or group
expel from a community or group	vote against; refuse to endorse; refuse to assent