jurisprudence vs petty jury

jurisprudence and petty jury both are nouns.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
petty jury	Yes	No	No	No

jurisprudence (noun)	petty jury (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	a jury of 12 to determine the facts and decide the issue in civil or criminal proceedings
the collection of rules imposed by authority