working vs practical

working is a noun but practical is not a noun.

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

working (noun)	practical (noun)
a mine or quarry that is being or has been worked

working (adjective)	practical (adjective)
actively engaged in paid work	concerned with actual use or practice
(of e.g. a machine) performing or capable of performing	having or put to a practical purpose or use
adopted as a temporary basis for further work	guided by practical experience and observation rather than theory
adequate for practical use; especially sufficient in strength or numbers to accomplish something	being actually such in almost every respect
serving to permit or facilitate further work or activity