jurisprudence vs null

jurisprudence and null both are nouns.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
null	Yes	Yes	No	No

jurisprudence (noun)	null (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
the collection of rules imposed by authority

jurisprudence (adjective)	null (adjective)
	lacking any legal or binding force