physics vs relativistic

physics is a noun but relativistic is not a noun.

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

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

physics (adjective)	relativistic (adjective)
	relating or subject to the special or the general theory of relativity
	of or relating to the philosophical doctrine of relativism