letters testamentary vs jurisprudence

letters testamentary and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
letters testamentary	Yes	No	No	No
jurisprudence	Yes	No	No	No

letters testamentary (noun)	jurisprudence (noun)
a legal document from a probate court or court officer informing you of your appointment as executor of a will and empowering you to discharge those responsibilities	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