ban vs cast out

ban is a noun but cast out is not a noun.

Word	Noun	Adjective	Verb	Adverb
ban	Yes	No	Yes	No
cast out	No	No	Yes	No

As verbs, ban and cast out are synonyms defined as:

Other synonyms of ban include banish, blackball, ostracise, ostracize, shun.

ban (noun)	cast out (noun)
a decree that prohibits something
an official prohibition or edict against something
100 bani equal 1 leu in Romania
100 bani equal 1 leu in Moldova
a logarithmic unit which measures information or entropy, based on base 10 logarithms and powers of 10.

ban (verb)	cast out (verb)
prohibit especially by legal means or social pressure	throw or cast away
forbid the public distribution of (a movie or a newspaper)	expel from a community or group
expel from a community or group
ban from a place of residence, as for punishment