agon vs Nemean Games

agon and Nemean Games both are nouns.

Word	Noun	Adjective	Verb	Adverb
agon	Yes	No	No	No
Nemean Games	Yes	No	No	No

As nouns, Nemean Games is a hyponym of agon; that is, Nemean Games is a word with a more specific, narrower meaning than agon:

agon: a festivity in ancient Greece at which competitors contended for prizes
Nemean Games: the ancient Panhellenic games held biennially at Nemea in the second and fourth years of each Olympiad

Other hyponyms of agon include Isthmian Games, Olympian Games, Olympic Games, Pythian Games.

agon (noun)	Nemean Games (noun)
a festivity in ancient Greece at which competitors contended for prizes	the ancient Panhellenic games held biennially at Nemea in the second and fourth years of each Olympiad