agon vs celebration

agon and celebration both are nouns.

Word	Noun	Adjective	Verb	Adverb
agon	Yes	No	No	No
celebration	Yes	No	No	No

As nouns, celebration is a hypernym of agon; that is, celebration is a word with a broader meaning than agon:

agon: a festivity in ancient Greece at which competitors contended for prizes
celebration: any joyous diversion

Other hypernyms of agon include festivity.

agon (noun)	celebration (noun)
a festivity in ancient Greece at which competitors contended for prizes	any joyous diversion
	the public performance of a sacrament or solemn ceremony with all appropriate ritual
	a joyful occasion for special festivities to mark some happy event