thermodynamics vs physics

thermodynamics and physics both are nouns.

Word	Noun	Adjective	Verb	Adverb
thermodynamics	Yes	No	No	No
physics	Yes	No	No	No

As nouns, physics is a hypernym of thermodynamics; that is, physics is a word with a broader meaning than thermodynamics:

thermodynamics: the branch of physics concerned with the conversion of different forms of energy
physics: the science of matter and energy and their interactions

Other hypernyms of thermodynamics include natural philosophy.

thermodynamics (noun)	physics (noun)
the branch of physics concerned with the conversion of different forms of energy	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something