cryogenics vs physics

cryogenics and physics both are nouns.

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

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

cryogenics: the branch of physics that studies the phenomena that occur at very low temperatures
physics: the science of matter and energy and their interactions

Other hypernyms of cryogenics include natural philosophy.

cryogenics (noun)	physics (noun)
the branch of physics that studies the phenomena that occur at very low temperatures	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something