tax system vs jurisprudence

tax system and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
tax system	Yes	No	No	No
jurisprudence	Yes	No	No	No

tax system (noun)	jurisprudence (noun)
a legal system for assessing and collecting taxes	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