proscription vs prohibition

proscription and prohibition both are nouns.

Word	Noun	Adjective	Verb	Adverb
proscription	Yes	No	No	No
prohibition	Yes	No	No	No

As nouns, proscription and prohibition are synonyms defined as:

Other synonyms of proscription include ban.

proscription (noun)	prohibition (noun)
rejection by means of an act of banishing or proscribing someone	the action of prohibiting or inhibiting or forbidding (or an instance thereof)
a decree that prohibits something	a decree that prohibits something
	refusal to approve or assent to
	a law forbidding the sale of alcoholic beverages
	the period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment