mechanical vs machinery

mechanical is not a noun while machinery is a noun.

Word	Noun	Adjective	Verb	Adverb
mechanical	No	Yes	No	No
machinery	Yes	No	No	No

mechanical (noun)	machinery (noun)
	machines or machine systems collectively
	a system of means and activities whereby a social institution functions

mechanical (adjective)	machinery (adjective)
using (or as if using) mechanisms or tools or devices
relating to or governed by or in accordance with mechanics
relating to or concerned with machinery or tools