jurisprudence vs therefor

jurisprudence is a noun but therefor is not a noun.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
therefor	No	No	No	Yes

jurisprudence (noun)	therefor (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do
the collection of rules imposed by authority

jurisprudence (adverb)	therefor (adverb)
	(in formal usage, especially legal usage) for that or for it