action at law vs jurisprudence

action at law and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
action at law	Yes	No	No	No
jurisprudence	Yes	No	No	No

action at law (noun)	jurisprudence (noun)
a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong	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