hydraulics vs mechanics

hydraulics and mechanics both are nouns.

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

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

hydraulics: study of the mechanics of fluids
mechanics: the branch of physics concerned with the motion of bodies in a frame of reference

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