jurisprudence vs lettre de cachet

jurisprudence and lettre de cachet both are nouns.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
lettre de cachet	Yes	No	No	No

jurisprudence (noun)	lettre de cachet (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	a warrant formerly issued by a French king who could warrant imprisonment or death in a signed letter under his seal
the collection of rules imposed by authority