ordinariness vs ordinary

ordinariness and ordinary both are nouns.

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

ordinariness (noun)	ordinary (noun)
the quality of being commonplace and ordinary	(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

ordinariness (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