usual vs ordinary

usual is not a noun while ordinary is a noun.

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

usual (noun)	ordinary (noun)
	(heraldry) any of several conventional figures used on shields
	an early bicycle with a very large front wheel and small back wheel
	a clergyman appointed to prepare condemned prisoners for death
	a judge of a probate court
	the expected or commonplace condition or situation

usual (adjective)	ordinary (adjective)
occurring or encountered or experienced or observed frequently or in accordance with regular practice or procedure	not exceptional in any way especially in quality or ability or size or degree
commonly encountered	lacking special distinction, rank, or status; commonly encountered