dome vs sports stadium

dome and sports stadium both are nouns.

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

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

Other hypernyms of dome include arena, bowl, stadium.

dome (noun)	sports stadium (noun)
a hemispherical roof	a large structure for open-air sports or entertainments
a stadium that has a roof
informal terms for a human head
a concave shape whose distinguishing characteristic is that the concavity faces downward