law vs ordinary

law and ordinary both are nouns.

Word	Noun	Adjective	Verb	Adverb
law	Yes	No	No	No
ordinary	Yes	Yes	No	No

law (noun)	ordinary (noun)
the learned profession that is mastered by graduate study in a law school and that is responsible for the judicial system	(heraldry) any of several conventional figures used on shields
a rule or body of rules of conduct inherent in human nature and essential to or binding upon human society	an early bicycle with a very large front wheel and small back wheel
a generalization that describes recurring facts or events in nature	a clergyman appointed to prepare condemned prisoners for death
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	a judge of a probate court
legal document setting forth rules governing a particular kind of activity	the expected or commonplace condition or situation
the collection of rules imposed by authority
the force of policemen and officers

law (adjective)	ordinary (adjective)
	not exceptional in any way especially in quality or ability or size or degree
	lacking special distinction, rank, or status; commonly encountered