routine vs procedure

routine and procedure both are nouns.

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

As nouns, procedure is a hypernym of routine; that is, procedure is a word with a broader meaning than routine:

Other hypernyms of routine include process.

As nouns, routine and procedure are synonyms defined as:

routine and procedure: a set sequence of steps, part of larger computer program

Other synonyms of routine include function, subprogram, subroutine.

routine (noun)	procedure (noun)
an unvarying or habitual method or procedure	a particular course of action intended to achieve a result
a set sequence of steps, part of larger computer program	a mode of conducting legal and parliamentary proceedings
a short performance that is part of a longer program	a process or series of acts especially of a practical or mechanical nature involved in a particular form of work
	a set sequence of steps, part of larger computer program

routine (adjective)	procedure (adjective)
found in the ordinary course of events