commonplace vs ordinary

commonplace and ordinary both are nouns.

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

commonplace (noun)	ordinary (noun)
a trite or obvious remark	(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

commonplace (adjective)	ordinary (adjective)
not challenging; dull and lacking excitement	not exceptional in any way especially in quality or ability or size or degree
repeated too often; overfamiliar through overuse	lacking special distinction, rank, or status; commonly encountered
completely ordinary and unremarkable