mechanical vs mechanics

mechanical is not a noun while mechanics is a noun.

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

mechanical (noun)	mechanics (noun)
	the technical aspects of doing something
	the branch of physics concerned with the motion of bodies in a frame of reference

mechanical (adjective)	mechanics (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