workflow vs work flow

workflow and work flow both are nouns.

Word	Noun	Adjective	Verb	Adverb
workflow	Yes	No	No	No
work flow	Yes	No	No	No

As nouns, workflow and work flow are synonyms defined as:

workflow and work flow: progress (or rate of progress) in work being done

workflow (noun)	work flow (noun)
progress (or rate of progress) in work being done	progress (or rate of progress) in work being done