General relativity and Theory of relativity

General relativity noun - A generalization of special relativity to include gravity (based on the principle of equivalence).

Theory of relativity and general relativity are semantically related. In some cases you can use "Theory of relativity" instead a noun phrase "General relativity".

Theory of relativity noun - (physics) the theory that space and time are relative concepts rather than absolute concepts.

General relativity and theory of relativity are semantically related. Sometimes you can replace phrase "General relativity" with "Theory of relativity", this phrases are similar.