skybox vs sports stadium

skybox and sports stadium both are nouns.

Word	Noun	Adjective	Verb	Adverb
skybox	Yes	No	No	No
sports stadium	Yes	No	No	No

As nouns, sports stadium is a hypernym of skybox; that is, sports stadium is a word with a broader meaning than skybox:

Other hypernyms of skybox include box, loge, arena, bowl, stadium.

skybox (noun)	sports stadium (noun)
an elevated box for viewing events at a sports stadium	a large structure for open-air sports or entertainments