undulatory theory vs wave theory of light

undulatory theory and wave theory of light both are nouns.

Word	Noun	Adjective	Verb	Adverb
undulatory theory	Yes	No	No	No
wave theory of light	Yes	No	No	No

As nouns, undulatory theory and wave theory of light are synonyms defined as:

undulatory theory and wave theory of light: (physics) the theory that light is transmitted as waves

Other synonyms of undulatory theory include wave theory.

undulatory theory (noun)	wave theory of light (noun)
(physics) the theory that light is transmitted as waves	(physics) the theory that light is transmitted as waves