vexatious litigation vs jurisprudence

vexatious litigation and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
vexatious litigation	Yes	No	No	No
jurisprudence	Yes	No	No	No

vexatious litigation (noun)	jurisprudence (noun)
litigation shown to have been instituted maliciously and without probable cause	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