particle physics vs physics

particle physics and physics both are nouns.

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

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

particle physics: the branch of physics that studies subatomic particles and their interactions
physics: the science of matter and energy and their interactions

Other hypernyms of particle physics include natural philosophy.

particle physics (noun)	physics (noun)
the branch of physics that studies subatomic particles and their interactions	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something