mundane vs ordinary

mundane is not a noun while ordinary is a noun.

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

mundane (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

mundane (adjective)	ordinary (adjective)
belonging to this earth or world; not ideal or heavenly	not exceptional in any way especially in quality or ability or size or degree
found in the ordinary course of events	lacking special distinction, rank, or status; commonly encountered
concerned with the world or worldly matters