physical science vs physics

physical science and physics both are nouns.

Word	Noun	Adjective	Verb	Adverb
physical science	Yes	No	No	No
physics	Yes	No	No	No

As nouns, physical science and physics are synonyms defined as:

physical science and physics: the physical properties, phenomena, and laws of something

physical science (noun)	physics (noun)
the physical properties, phenomena, and laws of something	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something