jurisprudence vs put behind bars

jurisprudence is a noun but put behind bars is not a noun.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
put behind bars	No	No	Yes	No

jurisprudence (noun)	put behind bars (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 (verb)	put behind bars (verb)
	lock up or confine, in or as in a jail