working vs workings

working and workings both are nouns.

Word	Noun	Adjective	Verb	Adverb
working	Yes	Yes	No	No
workings	Yes	No	No	No

As nouns, working and workings are synonyms defined as:

working (noun)	workings (noun)
a mine or quarry that is being or has been worked	the internal mechanism of a device
	a mine or quarry that is being or has been worked

working (adjective)	workings (adjective)
actively engaged in paid work
(of e.g. a machine) performing or capable of performing
adopted as a temporary basis for further work
adequate for practical use; especially sufficient in strength or numbers to accomplish something
serving to permit or facilitate further work or activity