event vs theory of relativity

event and theory of relativity both are nouns.

Word	Noun	Adjective	Verb	Adverb
event	Yes	No	No	No
theory of relativity	Yes	No	No	No

event (noun)	theory of relativity (noun)
something that happens at a given place and time	(physics) the theory that space and time are relative concepts rather than absolute concepts
a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory
a phenomenon that follows and is caused by some previous phenomenon
a special set of circumstances