refusal vs prohibition

refusal and prohibition both are nouns.

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

As nouns, prohibition is a hyponym of refusal; that is, prohibition is a word with a more specific, narrower meaning than refusal:

Other hyponyms of refusal include repudiation.

refusal (noun)	prohibition (noun)
a message refusing to accept something that is offered	the action of prohibiting or inhibiting or forbidding (or an instance thereof)
the act of refusing	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