diving event vs diving

diving event and diving both are nouns.

Word	Noun	Adjective	Verb	Adverb
diving event	Yes	No	No	No
diving	Yes	No	No	No

As nouns, diving event and diving are synonyms defined as:

diving event and diving: an athletic competition that involves diving into water

diving event (noun)	diving (noun)
an athletic competition that involves diving into water	a headlong plunge into water
	an athletic competition that involves diving into water