verboten vs taboo

verboten is not a noun while taboo is a noun.

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

As adjectives, verboten and taboo are synonyms defined as:

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

verboten (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

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

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