banishment vs ostracism

banishment and ostracism both are nouns.

Word	Noun	Adjective	Verb	Adverb
banishment	Yes	No	No	No
ostracism	Yes	No	No	No

As nouns, banishment and ostracism are synonyms defined as:

banishment and ostracism: the state of being banished or ostracized (excluded from society by general consent)

Other synonyms of banishment include Coventry.

banishment (noun)	ostracism (noun)
rejection by means of an act of banishing or proscribing someone	the act of excluding someone from society by general consent
the state of being banished or ostracized (excluded from society by general consent)	the state of being banished or ostracized (excluded from society by general consent)