jurisprudence vs vexatious litigation

jurisprudence and vexatious litigation both are nouns.

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

jurisprudence (noun)	vexatious litigation (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	litigation shown to have been instituted maliciously and without probable cause
the collection of rules imposed by authority