ordinary vs routine

ordinary and routine both are nouns.

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

ordinary (noun)	routine (noun)
(heraldry) any of several conventional figures used on shields	an unvarying or habitual method or procedure
an early bicycle with a very large front wheel and small back wheel	a set sequence of steps, part of larger computer program
a clergyman appointed to prepare condemned prisoners for death	a short performance that is part of a longer program
a judge of a probate court
the expected or commonplace condition or situation

ordinary (adjective)	routine (adjective)
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