festivity vs diversion

festivity and diversion both are nouns.

Word	Noun	Adjective	Verb	Adverb
festivity	Yes	No	No	No
diversion	Yes	No	No	No

As nouns, diversion is a hypernym of festivity; that is, diversion is a word with a broader meaning than festivity:

Other hypernyms of festivity include recreation.

festivity (noun)	diversion (noun)
any joyous diversion	an activity that diverts or amuses or stimulates
	a turning aside (of your course or attention or concern)
	an attack calculated to draw enemy defense away from the point of the principal attack