pneumatics vs mechanics

pneumatics and mechanics both are nouns.

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

As nouns, mechanics is a hypernym of pneumatics; that is, mechanics is a word with a broader meaning than pneumatics:

pneumatics: the branch of mechanics that deals with the mechanical properties of gases
mechanics: the branch of physics concerned with the motion of bodies in a frame of reference

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