prohibited vs taboo

prohibited is not a noun while taboo is a noun.

Word	Noun	Adjective	Verb	Adverb
prohibited	No	Yes	No	No
taboo	Yes	Yes	Yes	No

As adjectives, prohibited and taboo are synonyms defined as:

Other synonyms of prohibited include forbidden, out, proscribed, tabu, verboten.

prohibited (noun)	taboo (noun)
	an inhibition or ban resulting from social custom or emotional aversion
	a prejudice (especially in Polynesia and other South Pacific islands) that prohibits the use or mention of something because of its sacred nature

prohibited (adjective)	taboo (adjective)
forbidden by law	excluded from use or mention
excluded from use or mention	forbidden to profane use especially in South Pacific islands

prohibited (verb)	taboo (verb)
	declare as sacred and forbidden