dome vs covered stadium

dome and covered stadium both are nouns.

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

As nouns, dome and covered stadium are synonyms defined as:

Other synonyms of dome include domed stadium.

dome (noun)	covered stadium (noun)
a hemispherical roof	a stadium that has a roof
a stadium that has a roof
informal terms for a human head
a concave shape whose distinguishing characteristic is that the concavity faces downward